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Single‐atom catalysts (SACs) have received extensive attention in the fields of electrocatalytic sensing, and in response to the requirements of different sensing systems, a variety of metal single‐atom structures have been emerged. In this review, we at first introduce the current mainstream synthesis methods of SACs, and then focus on the structural regulation strategies of SACs and the structure‐performance relationship generated in electrocatalytic sensing. It is worth noting that we classify the regulation engineering of single‐atom structures and describe the corresponding enhanced performance of electrocatalytic sensing, which makes up for the shortcomings of reviews in this field. Eventually, the opportunities and challenges of SACs based electrochemical sensors are outlined. [ABSTRACT FROM AUTHOR]

Mo-doping is introduced to synchronously improve the electro catalytic activity and anti-chlorine corrosion of Ni 3 s 2 toward the efficient overall seawater splitting, thanks to the enhanced binding with *OH but the weakened one with *CL. [Display omitted] Designing highly active electrocatalysts that can resist chloride ion (Cl-) corrosion during seawater electrolysis is still a challenge. Here, Mo-doping is introduced to synchronously improve the electrocatalytic activity and anti-chlorine corrosion of Ni 3 S 2 toward the efficient overall seawater splitting. With commercial nickel-molybdenum foam (NMF) as the reactive substrates, Mo-doped Ni 3 S 2 columnar arrays (Mo-Ni 3 S 2 /NMF) are fabricated via a one-step hydrothermal process, which expose abundant active sites with the ameliorated surface electronic configurations toward the enhanced binding with *OH (* denotes an active site) but the weakened one with *Cl. As expected, they afford the excellent bi-functionality for both oxygen and hydrogen evolution reactions (OER and HER), with the remarkably improved anti-corrosion to Cl- at anode as compared to pristine Ni 3 S 2. In alkaline mimic seawater (1.0 M NaOH + 0.5 M NaCl), Mo-Ni 3 S 2 /NMF requires 330 mV (for OER) and 209 mV (for HER) overpotentials at the current density of ±100 mA cm−2, and a low cell voltage of 1.52 V at 10 mA cm−2 for overall seawater splitting. This work highlights a feasible strategy to explore highly active and stable electrocatalysts for sustainable H 2 production. [ABSTRACT FROM AUTHOR]

A molecular complex Mo2O2(μ-S)2(Et2dtc)2 (dtc = dithiocarbamate) is prepared and loaded onto carbon cloth (CC) through facile solvothermal treatment, followed by subsequent single-source pyrolysis. This results in a highly porous 2H-MoS2/CC composite with a sponge-like stacked lamellar morphology. Due to its high porosity and unique nano/microstructure, the MoS2/CC composite exhibits a specific capacitance of 550.0 F g−1 at 1 A g−1, outperforming some 1T-MoS2 based electrodes. The composite is further assembled into a symmetric all-solid-state supercapacitor, which can be operated stably at a wide potential window and shows a specific capacitance of 127.5 F g−1 at 1 A g−1. In addition, the device delivers a high energy density of 70.8 W h kg−1 at 1 kW kg−1, which still remains 15.0 W h kg−1 at 18.0 kW kg−1. 75% of the performance of the device can be retained after 8000 cycles. Such remarkable electrochemical performance is attributed to its novel nano/microstructures with a large surface area, convenient ion transport pathways, enhanced conductivity, and improved structural stability. Thus, this work demonstrates a highly promising dithiocarbamate-based single-precursor pyrolysis route towards the fabrication of metal sulfides/carbon composites for energy storage applications. [ABSTRACT FROM AUTHOR]

Hierarchical Cu dendrites fabricated via Cl-mediated electrodeposition afford high C2H4 efficiency (58% faradaic efficiency at −0.9 V vs. RHE) for CO2 electroreduction thanks to not only the optimal hydrophobicity/aerophilicity, but also the dominant distribution of active (100) and (110) facets. [ABSTRACT FROM AUTHOR]

The reductive amination of carbonyl compounds is one of the most straightforward protocols to construct C−N bonds, but highly desires active and selective catalysts. Herein, Pd/MoO3−x catalysts are proposed for furfural amination, in which the interactions between Pd nanoparticles and MoO3−x supports can be easily ameliorated by varying the preparation temperature toward efficient catalytic turnover. Thanks to the synergistic cooperation of MoV‐rich MoO3−x and highly dispersed Pd, the optimal catalysts afford the high yield of furfurylamine (84 %) at 80 °C. Thereinto, MoV species not only acts as the acidic promoter to facilitate the activation of carbonyl groups, but also interacts with Pd nanoparticles to promote the subsequent hydrogenolysis of Schiff base N‐furfurylidenefurfurylamine and its germinal diamine. The good efficiency of Pd/MoO3−x within a broad substrate scope further highlights the key contribution of metal‐support interactions to the refinery of biomass feedstocks. [ABSTRACT FROM AUTHOR]

MoS 2 nanosheets with conformal carbon coating are achieved via a facile, chemical vapor deposition process, employing ethanol vapor as carbon source. The uniform carbon layers are semi-graphitized, which facilitate kinetics for electron and ion transfer, accommodate volume variation of MoS 2 , and relieve dissolution of polysulfide during repeated discharge/charge cycles. As anode materials for sodium-ion batteries, the optimized carbon coated MoS 2 nanosheets show stable reversible capacity of ∼500 mAh g −1 for 100 cycles at 0.1 A g −1 , and maintain 351.6 mAh g −1 after 200 cycles even at 1 A g −1 . Furthermore, the enhanced electron transfer, and the stabilized structure are verified through electrochemical impedance spectroscopy, cyclic voltammetry, as well as scanning electron microscopy. Our results show that the carbon coating by chemical vapor deposition is efficient and promising to improve the reversible Na + storage performance of anode materials. [ABSTRACT FROM AUTHOR]

The promoted electrocatalytic hydrogenation of biomass-derived furfural to 2-methylfuran is for the first time identified in a water/oil bi-phasic system, in which the oil phase can quickly separate hydrophobic products from the electrode/electrolyte interfaces, resulting in a beneficial equilibrium toward hydrodeoxygenation. [ABSTRACT FROM AUTHOR]

The novel catalyst can be applied for different substrates to give aldehydes and ketones, epoxides, sulfoxides and imines with good selectivity. [ABSTRACT FROM AUTHOR]

The rational fabrication of Pt‐free catalysts for driving the development of practical applications in alkaline water electrolysis and fuel cells is promising but challenging. Herein, a promising approach is outlined for the rational design of multimetallic catalysts comprising multiple active sites including Pd nanoclusters and Ru single atoms anchored at the defective sites of Ni(OH)2 to simultaneously enhance hydrogen evolution reactions (HER) and ethanol oxidation reactions (EOR). Remarkably, Pd12Ru3/Ni(OH)2/C exhibits a remarkably reduced HER overpotential (16.1 mV@10 mA cm−2 with a Tafel slope of 21.8 mV dec−1) as compared to commercial 20 wt.% Pt/C (26.0 mV@10 mA cm−2, 32.5 mV dec−1). More importantly, Pd12Ru3/Ni(OH)2/C possesses a self‐optimized overpotential to 12.5 mV@10 mA cm−2 after 20 000 cycles stability test while a significantly decreased performance for commercial 20wt.% Pt/C (64.5 mV@10 mA cm−2 after 5000 cycles). The mass activity of Pd12Ru3/Ni(OH)2/C for the EOR is up to 3.724 A mgPdRu−1, ≈20 times higher than that of commercial Pd/C. Electrochemical in situ Fourier transform infrared measurements confirm the enhanced CO2 selectivity of Pd12Ru3/Ni(OH)2/C while synergistic and electronic effects of adjacent Ru, Pd, and OHad adsorption on Ni(OH)2 at low potential play a key role during EOR. [ABSTRACT FROM AUTHOR]

[Display omitted] Bi-functional electrocatalysts are desired for both hydrogen and oxygen evolution reactions (HER and OER). Herein, facile O 2 -plasma activation is introduced to improve the bi-functionality via constructing nickel sulfide-oxide heterostructures. Ni 3 S 2 -NiO x supported by nickel foam delivers obviously elevated HER and OER activity in comparison with pristine Ni 3 S 2 and recently reported NiS x -based electrocatalysts, featured by the low overpotentials for HER (104 mV) and OER (241 mV) at ±10 mA cm−2 in 1.0 M KOH, as well as a voltage of 1.52 V for overall water splitting. As revealed by in-situ Raman spectroscopy, on the one hand, Ni(OH) 2 generated from Ni 3 S 2 during alkaline HER accelerates water dissociation toward the gradually improved performance; on the other hand, this heterostructure undergoes extensive oxidation during OER, leading to excessive NiOOH covering on Ni 3 S 2 and thereby declining activity. These changes are interpreted by the distinct thermodynamic relationship under specific electrochemical conditions via density functional theory calculations. [ABSTRACT FROM AUTHOR]

Single-layer CoFe layered double hydroxides (CoFe LDH-S) are successfully fabricated under near-anhydrous conditions due to the weakened hydrogen bonds between monolayers. Benefiting from the single-layer structure with rich defects and disordered lattices, CoFe LDH-S affords superior OER activity compared to its bulky counterparts and most of the recently reported non-precious electrocatalysts. [ABSTRACT FROM AUTHOR]

[Display omitted] Electrocatalytic hydrogenation (ECH) enables the sustainable production of chemicals under ambient condition; however, suffers from serious competition with hydrogen (H 2) evolution and the use of precious metals as electrocatalysts. Herein, molybdenum disulfide is for the first time developed as an efficient and noble-metal-free catalyst for ECH via in situ intercalation of ammonia or alkyl-amine cations. This interlayer engineering regulates phase transition (2H → 1 T), and effectively ameliorates electronic configurations and surface hydrophobicity to promote the ECH of biomass-derived oxygenates, while prohibiting H 2 evolution. The optimal one intercalated by dimethylamine (MoS 2 -DMA) is capable of hydrogenating furfural (FAL) to furfuryl alcohol with high Faradaic efficiency of 86.3%–73.3% and outstanding selectivity of >95.0% at −0.25 to −0.65 V (vs. RHE), outperforming MoS 2 and other conventional metals. Such prominent performance stems from the enhanced chemisorption and surface hydrophobicity. The chemisorption of H intermediate and FAL, synchronously strengthened on the edge-sites of MoS 2 -DMA, accelerates the surface elementary step following Langmuir-Hinshelwood mechanism. Moreover, the improved hydrophobicity benefits FAL affinity to overcome diffusion limitation. Discovering the effective modulation of MoS 2 from a typical H 2 evolution electrocatalyst to a promising candidate for ECH, this study broadens the scope to exploit catalysts used for electrochemical synthesis. [ABSTRACT FROM AUTHOR]

Main observation and conclusion: Anode materials based on conversion reactions usually possess high energy densities for lithium‐ion batteries (LIBs). However, they suffer from poor rate performance and cycle life due to serious volume changes. Herein, α/β‐CoMoO4 heterogeneous nanorods are synthesized via a facile co‐precipitation method, and further are phase‐engineered through varying calcination temperature, accomplishing the obviously improved cycle life and rate performance as anodes for LIBs. When evaluated at a current density of 1.0 A·g–1, the optimal nanorods with an α/β phase ratio of 6.0 afford the reversible capacity of 1143.6 mAh·g–1 after 200 cycles, outperforming most of recently reported bimetal oxides. Li+ storage mechanism is further analyzed by using in‐situ X‐ray diffraction and ex‐situ transition electronic microscopy. It's revealed that β‐CoMoO4 follows a one‐step conversion reaction; while α‐CoMoO4 proceeds an intercalation pathway before the conversion reaction. Grading storage of Li+ would alleviate the volume effect of heterostructured α/β‐CoMoO4, forming electronically conductive network evenly composed of Co and Mo nanograins to enable the reversible electrochemical conversion. This work is anticipated to give some hints for the rational design of high‐performance energy materials. [ABSTRACT FROM AUTHOR]

To explore high-performance carbide catalysts for hydrogen evolution reaction (HER), the rational design of hierarchically porous catalyst benefitting active-site exposure and fast mass transport is extremely demanded. Herein, Chinese ink (CI), used for writing and drawing for thousands of years, is adopted to promote the formation of co-assembly of carbon nanoparticles and Mo-based lamellar organic-inorganic hybrids, which, after pyrolysis in Ar atmosphere, is further converted to 3D hierarchically structured and porous MoC x /C nanocomposites (HSP-MoC x /C) for high-efficient HER. Their skeleton structure, porosity, carbon amounts, phase composition and active species dispersity are well modulated by simply tuning the CI dosage in starting mixture, and its mechanism is monitored via a series of physicochemical characterization techniques. The optimal composite exhibits remarkable HER activity with low overpotentials of 112 and 86 mV at current density of 10 mA cm−2, and the small Tafel slopes of 52 and 50 mV dec−1 in 0.5 M H 2 SO 4 and 1 M KOH solution, respectively. Such performance stems from the combined effects of enhanced ion/mass transport, abundant exposed active sites and high conductivity due to the 3D hierarchically skeleton architecture of catalysts. This work paves a new strategy to design hierarchically porous materials for chemical conversion and energy storage. Image 1 [ABSTRACT FROM AUTHOR]

• CoMoO4@NC facilitates electron/Na+ diffusion, exposes active-sites and buffers volume variation. • CoMoO4@NC accomplishes long serving life as an anode for sodium-ion batteries. • Practical application is highlighted in full-cells consisting of CoMoO4@NC anode. Volume expansion and poor conductivity result in poor cyclability and low rate capability, which are the major challenges of transition-metal oxide as anode materials for sodium-ion batteries (SIBs). Herein, N -doped carbon encapsulated CoMoO 4 (CoMoO 4 @NC) nanorods are developed as excellent anode materials for SIBs with long-cycle life. The N -doped carbon shells serve as buffer to accommodate severe volume changes during sodiation/desodiation, and at the same time improve electronic conductivity and activate surface sites of CoMoO 4. The optimized composite presents rapid reaction kinetics and excellent cycle stability. Even at a high current density of 1 A g−1, it still shows long-cycle life and maintains specific capacity of 190 mAh g−1 after 3200 cycles. Furthermore, CoMoO 4 @NC anode is applied to match with Na 3 V 2 (PO 4) 3 cathode to assemble full-cells, in which it accomplishes reversible capacity of 152 mAh g−1 after 100 cycles, with capacity retention of 75% at a current density of 1 A g−1, highlighting the practical application for SIBs. [ABSTRACT FROM AUTHOR]

• Bimetallic Mo 1-x W x S 2 identifies composition-dependent H 2 O 2 sensing associated with intermediate bindings. • The optimal Mo 0.75 W 0.25 S 2 accomplishes outstanding performance in H 2 O 2 sensing. • The Mo 0.75 W 0.25 S 2 distinguishes cancer cells via monitoring endogenous H 2 O 2. Two-dimensional transition-metal dichalcogenides can serve as emerging biosensing platforms after rational structural optimization. Herein, we develop a series of Mo 1-x W x S 2 and investigate the composition-dependent sensing of hydrogen peroxide (H 2 O 2). Among them, the Mo 0.75 W 0.25 S 2 affords high sensitivity (1290 μA mM−1 cm−2), good selectivity, and wide applicable concentration range (4 × 10−1–1.0 × 104 μM). As indicated by theoretical investigations, such prominent performance stems from the bimetallic electronic configurations and the enhanced *OH binding on surface. Moreover, the Mo 0.75 W 0.25 S 2 is capable of monitoring trace amounts of H 2 O 2 released from normal cells and various cancer cells, which provides efficient cell detection for clinical diagnosis. In addition, the composition-dependence, as a result of electronic modulation on Mo 1-x W x S 2 surface, is further evidenced on electrocatalytic hydrogen evolution reaction, which highlights the promise in sensing and electrocatalysis that share similar electrochemical fundamentals. [ABSTRACT FROM AUTHOR]

Heterostructured Mo2C‐MoOx on carbon cloth (Mo2C‐MoOx/CC), as a model of easily oxidized electrocatalysts under ambient conditions, is investigated to uncover surface reconfiguration during the hydrogen evolution reaction (HER). Raman spectroscopy combined with electrochemical tests demonstrates that the MoVI oxides on the surface are in situ reduced to MoIV, accomplishing promoted HER in acidic condition. As indicated by density functional theoretical calculations, the in situ reduced surface with terminal Mo=O moieties can effectively bring the negative ΔGH* on bare Mo2C close to a thermodynamic neutral value, addressing difficult H* desorption toward fast HER kinetics. The optimized Mo2C‐MoOx/CC only requires a low overpotential (η10) of 60 mV at −10 mA cm−2 in 1.0 m HClO4, outperforming Mo2C/CC and most non‐precious electrocatalysts. In situ surface reconfiguration are shown on W2C‐WOx, highlighting the significance to boost various metal‐carbides and to identify active sites. [ABSTRACT FROM AUTHOR]

Heterostructured Mo2C‐MoOx on carbon cloth (Mo2C‐MoOx/CC), as a model of easily oxidized electrocatalysts under ambient conditions, is investigated to uncover surface reconfiguration during the hydrogen evolution reaction (HER). Raman spectroscopy combined with electrochemical tests demonstrates that the MoVI oxides on the surface are in situ reduced to MoIV, accomplishing promoted HER in acidic condition. As indicated by density functional theoretical calculations, the in situ reduced surface with terminal Mo=O moieties can effectively bring the negative ΔGH* on bare Mo2C close to a thermodynamic neutral value, addressing difficult H* desorption toward fast HER kinetics. The optimized Mo2C‐MoOx/CC only requires a low overpotential (η10) of 60 mV at −10 mA cm−2 in 1.0 m HClO4, outperforming Mo2C/CC and most non‐precious electrocatalysts. In situ surface reconfiguration are shown on W2C‐WOx, highlighting the significance to boost various metal‐carbides and to identify active sites. [ABSTRACT FROM AUTHOR]

Spinal cord injury (SCI) can cause locomotor dysfunctions and sensory deficits. Evidence shows that functional nanodrugs can regulate macrophage polarization and promote anti-inflammatory cytokine expression, which is feasible in SCI immunotherapeutic treatments. Molybdenum disulfide (MoS 2) nanomaterials have garnered great attention as potential carriers for therapeutic payload. Herein, we synthesize MoS 2 @PEG (MoS 2 = molybdenum disulfide, PEG = poly (ethylene glycol)) nanoflowers as an effective carrier for loading etanercept (ET) to treat SCI. We characterize drug loading and release properties of MoS 2 @PEG in vitro and demonstrate that ET-loading MoS 2 @PEG obviously inhibits the expression of M1-related pro-inflammatory markers (TNF-α, CD86 and iNOS), while promoting M2-related anti-inflammatory markers (Agr1, CD206 and IL-10) levels. In vivo , the mouse model of SCI shows that long-circulating ET-MoS 2 @PEG nanodrugs can effectively extravasate into the injured spinal cord up to 96 h after SCI, and promote macrophages towards M2 type polarization. As a result, the ET-loading MoS 2 @PEG administration in mice can protect survival motor neurons, thus, reducing injured areas at central lesion sites, and significantly improving locomotor recovery. This study demonstrates the anti-inflammatory and neuroprotective activities of ET-MoS 2 @PEG and promising utility of MoS 2 nanomaterial-mediated drug delivery. [ABSTRACT FROM AUTHOR]

As a promising anode material for sodium-ion batteries, MoS 2 unfortunately suffers from its poor electrical/ionic conductivity and drastic volume variation during the repeated sodiation/desodiation, which lead to unsatisfied rate capability and cycleability. Herein, we employ popcorn, an environment benign biomass, as carbon source to construct MoS 2 /popcorn-derived carbon composites. The composite processes a sandwich-like structure due to the intercalation of carbon, realizing sufficient contact of MoS 2 monolayers with carbon as well as expanded interspace of (002) layers in MoS 2. The sandwiched structure facilitates electronic transfer as well as Na+ diffusion, and is robust to the volume variation during the sodiation/desodiation. As an anode material for sodium-ion batteries, the optimized composite displays a reversible capacity of 475 mAh g−1 at 0.2 A g−1 in the initial cycle, and maintains 406.9 mAh g−1 after 340 cycles. When coupled with NaV 0.9 Fe 0.1 PO 4 in full sodium-ion batteries, the composite delivers a reversible capacity of 278.4 mAh g−1 in the voltage range of 1.0–3.2 V at 1 A g−1, indicating its practical application for sodium-ion batteries. Image 1 • Environment benign biomass, popcorn is employed construct MoS 2 /C composites. • The composite processes a sandwich-like structure due to the intercalation of PDC. • The robust sandwiched structure facilitates Na+ diffusion and electronic transfer. • The MoS 2 /PDC exhibits prominent performance as an anode for sodium-ion batteries. [ABSTRACT FROM AUTHOR]

Graphical abstract Highlights • Electrospinning is introduced to design Ni2-xCoxP/N-C NFs with tailored electronic configuration. • Electronic modulation leads to the enhanced hydrogen binding and the promoted HER kinetics. • Optimal Ni2-xCoxP/N-C NFs deliver high efficiency for HER and overall water splitting. Abstract Exploring noble-metal-free electrocatalysts for hydrogen evolution reaction (HER) is the key issue in hydrogen economy blueprint. Herein, bimetallic Ni 2-x Co x P supported by N-doped carbon nanofibers (denoted as Ni 2-x Co x P/N-C NFs) are developed via electrospinning followed by pyrolysis under an inert flow. The space confinement by in-situ formed N-doped carbon matrix produces ultrafine Ni 2-x Co x P with abundant active-sites. More importantly, the engineering on Ni 2-x Co x P solid-solution-alloys can vary electronic configuration and consequently optimize hydrogen binding on electrocatalyst surface, accomplishing prominent HER activity in a wide pH range. The optimal Ni 2-x Co x P/N-C NFs afford low overpotentials (η 10) of 100, 130 and 110 mV to reach a current density of -10 mA cm−2 in 0.5 M H 2 SO 4 , 1.0 KOH and 1.0 M PBS (phosphate buffer saline), respectively, performing among the best of noble-metal-free electrocatalysts. With a good functionality for oxygen evolution (η 10 = 280 mV), such composite further delivers a high efficiency for overall water splitting, featuring a comparable cell voltage (1.56 V @ 10 mA cm−2) to a commercial IrO 2 /C − Pt/C couple, and remarkably better stability. Identifying electrocatalysis relying on solid-solution alloys, this work will inspire the exploration of cost-efficient electrocatalysts and the new understanding on catalytic mechanisms. [ABSTRACT FROM AUTHOR]

• Co x Ni 1−x /N-C nanofibers are fabricated via facile electrospinning procedures. • Electronic regulation is achieved via varying Co x Ni 1−x composition. • The optimal Co 0.75 Ni 0.25 /N-C affords highly efficient CO 2 reduction to CO. Electronic modulation on catalysts is vital to improve the efficiency of electrochemical CO 2 reduction reactions (CO 2 RR). Herein, Co x Ni 1−x nanoalloys supported by N-doped carbon nanofibers (Co x Ni 1−x /N-C NFs) are constructed and regulated via facile electrospinning procedures followed by pyrolysis, to efficiently catalyze CO 2 reduction toward CO. The modulated electronic configuration is experimentally and theoretically evidenced in Co x Ni 1−x along with varied composition and interactions. The d -band center up-shifts with increasing Co in Co x Ni 1−x nanoalloys, leading to obvious variation in the binding energy of key intermediates (*COOH, *CO and *H, * denotes a surface active site) and the reaction free energy (△G). Among the Co x Ni 1−x , the Co 0.75 Ni 0.25 features the lowest △G (positive) to generate *COOH and desorb *CO, and the highly negative △ G * H , indicating the promoted CO 2 RR but prohibited hydrogen evolution. As expected, the optimal Co 0.75 Ni 0.25 /N-C NFs afford a high CO Faradaic efficiency of 85.0% and a current density of −13.4 mA cm−2 at −0.9 V vs. RHE in 0.5 M NaHCO 3 , performing at the high-level of noble-metal-free electrocatalysts. Elucidating efficient electrocatalysis over well-tailored alloys, our work will open up new opportunities for exploring high-performance materials used in sustainable energy conversion. [ABSTRACT FROM AUTHOR]

Abstract Noble-metal-free electrocatalysts are highly desired for the sustainable H 2 production via water electrolysis. Herein, we report on heterostructured MoC-MoP nanoparticles supported by bacterial cellulose-derived N-doped carbon nanofibers (denoted as MoC-MoP/BCNC NFs) as cost-efficient electrocatalysts for hydrogen evolution reaction (HER). As evidenced, the presence of MoC can prevent MoP from coarsening due to the strong interfacial interactions, resulting in ultrafine nanoparticles evenly integrated with conducting N-doped carbon matrix. More importantly, such heterostructured MoC-MoP delivers tailored electronic configurations toward the optimal binding with intermediate H, accomplishing the promoted HER kinetics. Thereby, the MoC-MoP/BCNC NFs exhibit higher HER activity and faster kinetic metrics in comparison with the single-component counterparts (e.g., MoC/BCNC and MoP/BCNC). They afford low overpotentials of 158 and 137 mV to achieve a current density of −10 mV cm−2 and small Tafel slopes of 58 and 65 mV dec−1 in 0.5 M H 2 SO 4 and 1.0 M KOH, respectively. Elucidating efficient electrocatalysis on the MoC-MoP interfaces, this work will open up new opportunities for exploring cost-efficient electrocatalysts in sustainable energy conversion. Graphical abstract Image 1 Highlights • Strong interactions between MoC and MoP lead to ultrafine MoC-MoP hetero-nanoparticles. • MoC-MoP interfaces exhibit optimized electronic configuration toward intrinsically promoted HER kinetics. • The MoC-MoP/BCNC NFs accomplish prominent HER in both acidic and basic electrolytes. [ABSTRACT FROM AUTHOR]

Graphical abstract Highlights • CoNiSe 2 nanorods are hierarchically decorated by LDHs toward interfacial synergy. • CoNiSe 2 -LDHs interfaces afford remarkably promoted HER and overall water splitting. • Synergic promotion on interfaces is theoretically and experimentally evidenced. Abstract Efficient electrocatalysts for hydrogen evolution reaction (HER) are critical to reduce energy losses in alkaline water electrolysis. Herein, CoNiSe 2 heteronanorods decorated with layered-double-hydroxides (LDHs) nanosheets are designed, in which the selenide-LDHs interfaces can boost H 2 O chemisorption to produce reactive H intermediate, resulting in fast HER kinetics. Such promotion in HER is further interpreted by theoretical calculation and in-situ Raman investigation. By contrast, it's negligible for anodic oxygen evolution. Assembled as an electrolyzer for overall water splitting, the heteronanorods afford a quite low cell voltage of 1.44 V at a geometric current density of 10 mA cm−2 and remarkable stability for more than 48 h in 1.0 M KOH, performing among the best of non-precious electrocatalysts. Identifying efficient electrocatalysis on engineered heterointerfaces, this work is anticipated to open up new opportunities for catalyst design in energy chemistry. [ABSTRACT FROM AUTHOR]

Hydrogenation of α,β‐unsaturated aldehydes to unsaturated alcohols suffers a huge challenge in chemoselectivity. Herein, surface decoration by FeOx is introduced to remarkably improve the selectivity of cinnamyl alcohol (COL) in cinnamaldehyde (CAL) hydrogenation on Pt/MoO3−y. The enhanced acidity on Pt–FeOx interfaces is beneficial for the chemisorption and activation of C=O bonds, promoting selective hydrogenation. The optimal catalysts with defined FeOx decoration afford efficient and chemoselective CAL hydrogenation (91.3 % selectivity) under mild conditions (PH2=1 MPa, T=30 °C). Moreover, such innovation is further extended to develop other efficient metal (Ir, Rh and Pd) catalysts, identifying a universal promotion to Pt‐group metals. This work is anticipated to inspire the rational design of high‐performance catalysts via effective surface/interface engineering. Surface modification by FeOx is introduced to remarkably improve the selectivity of cinnamyl alcohol in cinnamaldehyde hydrogenation over Pt/H‐MoO3. The abundant Pt–FeOx interface and acidic surface contribute to the remarkably improved selectivity and activity. [ABSTRACT FROM AUTHOR]

As promising catalyst supports, hydrogenated metal-oxides can afford engineered surface architectures and electronic configurations to promote catalytic turnover on loading metals. Herein, hydrogenated TiO2 (H-TiO2) fabricated via NaBH4 reduction is successfully introduced to boost the catalytic oxidation of formaldehyde (HCHO), which is one of the most common and harmful indoor volatile organic compounds. Distinct from the parent TiO2, H-TiO2 features enriched surface hydroxyls and enhanced metal–support interactions upon loading Ir, which are responsible for remarkable promotion in HCHO oxidation. In particular, the abundant hydroxyls on H-TiO2 promote the generation of HCOO−, which is believed to be the rate-determining step in HCHO oxidation. This discovery is anticipated to pave the way for exploring high-performance metal catalysts on oxide supports via surface and interfacial engineering. [ABSTRACT FROM AUTHOR]

Transition metal carbides as promising anode materials for lithium ion batteries (LIBs) have attracted wide attention due to their high conductivity and high capacity. In this work, we have developed MoC/C nanowires as anode materials with high capacity and excellent cyclic stability. These nanowires are featured by a mesoporous structure resulting from stacking of carbon coated MoC nanocrystals. This structure provides shortened paths for Li + diffusion and freeways for electron transfer, moreover, it effectively relieves the volume change of MoC nanocrystallites during the discharge/charge cycles. Therefore, the MoC/C nanowires exhibit excellent cyclic stability even at high current densities. At 0.2 A g −1 , they perform reversible capacity of 650.3 mAh g −1 after 350 cycles, with capacity retention of 93.4%. Even at a high current density of 2 A g −1 , they maintain 455.4 mAh g −1 after 2000 cycles, with average capacity loss rate of only 0.004% per cycle. The high capacity and outstanding stability indicate the potential of the MoC/C nanowires as anode materials for high performance LIBs. [ABSTRACT FROM AUTHOR]

Abstract: As promising supports, reducible metal oxides afford strong metal–support interactions to achieve efficient catalysis, which relies on their band states and surface stoichiometry. In this study, in situ and controlled hydrogen doping (H doping) by means of H2 spillover was employed to engineer the metal–support interactions in hydrogenated MoOx‐supported Ir (Ir/H−MoOx) catalysts and thus promote furfural hydrogenation to furfuryl alcohol. By easily varying the reduction temperature, the resulting H doping in a controlled manner tailors low‐valence Mo species (Mo5+ and Mo4+) on H−MoOx supports, thereby promoting charge redistribution on Ir and H−MoOx interfaces. This further leads to clear differences in H2 chemisorption on Ir, which illustrates its potential for catalytic hydrogenation. As expected, the optimal Ir/H−MoOx with controlled H doping afforded high activity (turnover frequency: 4.62 min−1) and selectivity (>99 %) in furfural hydrogenation under mild conditions (T=30 °C, P H 2 =2 MPa), which means it performs among the best of current catalysts. [ABSTRACT FROM AUTHOR]

Controlled N-doping is feasible to engineer the surface stoichiometry and the electronic configuration of metal-oxide electrocatalysts toward efficient oxygen reduction reactions (ORR). Taking reduced graphene oxide supported tantalum-oxides (TaO x /RGO) for example, this work illustrated the controlled N-doping in both metal-oxides and carbon supports, and the contribution to the improved ORR activity. The active N-doped TaO x /RGO electrocatalysts were fabricated via SiO 2 -assisted pyrolysis, in which the amount and kind of N-doping were tailored toward efficient electrocatalysis. The optimal nanocomposites showed a quite positive half-wave potential (0.80 V vs. RHE), the excellent long-term stability, and the outstanding tolerance to methanol crossing. The improvement in ORR was reasonably attributed to the synergy between N-doped TaO x and N-doped RGO. Elucidating the importance of controlled N-doping for electrocatalysis, this work will open up new opportunities to explore noble-metal-free materials for renewable energy applications. [ABSTRACT FROM AUTHOR]

The hydrogenation of functionalized nitroarenes to the corresponding anilines is of great importance in the fine chemical industry and requires high-performance catalysts with a good activity and selectivity. Herein, hydrogenated MoO x (H-MoO x) supported bimetallic Pt-Sn (Pt-Sn/H-MoO x) was developed to accomplish selective and efficient hydrogenation. In the case of 4-nitrostyrene, an outstanding selectivity to 4-vinylaniline (≈93 %) with a high turnover frequency (0.094 s−1) was achieved under mild conditions ( T=30 °C, P [ABSTRACT FROM AUTHOR]

Herein we report Mo 2 C/N-doped carbon hierarchical nanowires (Mo 2 C/N-C HNWs) as anode materials for sodium-ion batteries. In the Mo 2 C/N-C HNWs, Mo 2 C nanocrystallites are uniformly distributed in N-doped carbon matrix. The nanocrystallites of Mo 2 C offer short paths for Na + diffusion, the mesoporous structure facilitates the diffusion of electrolyte, and the N-doped carbon matrix accelerates the electron transfer. As anode materials for sodium-ion batteries, the Mo 2 C/N-C HNWs exhibited reversible capacities of 381 and 308 mAh g −1 at current densities of 50 and 200 mA g −1 , respectively. Our results demonstrate the enhanced Na + storage activity of Mo 2 C after structure tailoring, elucidating the potential of transition-metal carbides as promising anode materials for sodium-ion batteries. [ABSTRACT FROM AUTHOR]

The hydrogenation of nitroarenes to value-added aromatic amines requires active and selective catalysts. Due to the good efficiency, economic cost and high earth-abundance, Ni-based nanostructures emerge as the promising catalysts, which are however limited by the poor dispersion and unsatisfied durability. Herein, Mo 2 C nanowires was introduced as a versatile support towards the highly dispersive Ni owing to the strong metal-support interactions on carbide surface, accomplishing the high activity in the hydrogenation of 3-nitrobenzoic acid, 4-nitrobenzoic acid and nitrobenzene. However, the presence of water that promoted the selective hydrogenation unfortunately deactivated Ni species. An effective carbon coating was further introduced to remarkably enhance the stability, protecting active Ni from corrosive H + and H 2 O. This work elucidates a feasible way towards efficient and stable catalysts by the introduction of both carbide supports and carbon coating, shedding some light on the development of high-performance catalysts. [ABSTRACT FROM AUTHOR]

As reducible supports, metal oxides present the varied charge effect after hydrogen doping and partial reduction, accomplishing the tunable metal-support interactions and the promoted catalytic turnover in heterogeneous catalysis. Herein, the one-pot fabrication of hydrogenated MoO x (H-MoO x ) nanorods supported Ir (Ir/H-MoO x ) was developed, which simultaneously combined the generation of active centers (Ir) and the hydrogen doping on supports (H-MoO x ). Because of the accumulated electrons around MoO 6 octahedras after hydrogen doping, the electronic perturbations arising from H-MoO x supports led to the negatively charge Ir δ− species being beneficial for the selective hydrogenation of C O moiety in α,β-unsaturated aldehydes. In the hydrogenation of cinnamaldehyde to cinnamyl alcohol, Ir/H-MoO x delivered selectivity as high as ∼93%, performing among the best of current metal-based catalysts. Additionally, the efficacy for various substrates with multiple groups further verified our Ir/H-MoO x system to be competitive for chemoselective hydrogenation. [ABSTRACT FROM AUTHOR]

Efficient hydrogen evolution reaction (HER) over noble-metal-free electrocatalysts provides one of the most promising pathways to face the energy crisis. Herein, facile cobalt-doping based on Co-modified MoO x-amine precursors is developed to optimize the electrochemical HER over Mo2C nanowires. The effective Co-doping into Mo2C crystal structure increases the electron density around Fermi level, resulting in the reduced strength of Mo-H for facilitated HER kinetics. As expected, the Co-Mo2C nanowires with an optimal Co/Mo ratio of 0.020 display a low overpotential ( η10 = 140 and 118 mV for reaching a current density of -10 mA cm−2; η100 = 200 and 195 mV for reaching a current density of -100 mA cm−2), a small Tafel slope (39 and 44 mV dec−1), and a low onset overpotential (40 and 25 mV) in 0.5 m H2SO4 and 1.0 m KOH, respectively. This work highlights a feasible strategy to explore efficient electrocatalysts via engineering on composition and nanostructure. [ABSTRACT FROM AUTHOR]

Exploring noble-metal free electrocatalysts remains a great challenge for hydrogen evolution reaction (HER). Herein, we report the fabrication of molybdenum carbides supported by N-doped carbon (MoC x /CN), employing glucose and melamine as precursors to generate conducting supports. The nanosized MoC x , and its intimate contact with CN, favor the efficient HER. The optimal MoC x /CN delivers an overpotential ( η ) of 220 mV to produce a current density ( j ) of 10 mA cm −2 , and a high j of 72 mA cm −2 at η=300 mV in 0.5 M H 2 SO 4 . [ABSTRACT FROM AUTHOR]

Developing alkaline hydrogen evolution reaction catalysts with ultra-low overpotential remains a significant challenge. In this paper, a three-dimensional porous Ru/α-MoC has been developed, which features the dual active sites of α-MoC and Ru. The coexistence of ultrafine Ru nanoparticles and Ru single atoms in Ru/α-MoC system is demonstrated by multiple structural characterizations. The fabricated Ru/α-MoC exhibits excellent alkaline HER activity with a low overpotential 25 mV at 10 mA cm−2, outperforming commercial 20% Pt/C (45 mV), and robust electrocatalytic stability at an industrial-scale current density of 400 mA cm−2. Particularly, the turnover frequency value reaches 39.2 s−1 at the overpotential of 100 mV. Experiments and theory investigations demonstrate the electron redistribution at the interface of α-MoC and Ru. The synergistic effect of dual active sites enables the easy cleavage of H-OH bond and the optimal H adsorption energy simultaneously. This work opens up a feasible way to rationally design high-efficient electrocatalysts with dual active sites for typical multistep reactions. The three-dimensional porous Ru/α-MoC with dual active sites as HER electrocatalyst achieves ultralow overpotential at alkaline media. The excellent activity origin is the synergistic effect of dual active sites that facilitate water dissociation and weaken the H adsorption free energy, resulting in an accelerated reaction kinetics for alkaline hydrogen generation. [Display omitted] • High dispersed Ru species are anchored on α-MoC to construct Ru/α-MoC nanocomposites with dual active sites. • Ru/α-MoC interfaces afford remarkably promoted alkaline HER performance. • The synergistic effect of dual active sites at the interfaces enables the easy cleavage of H-OH bond and the optimal H adsorption energy simultaneously. [ABSTRACT FROM AUTHOR]

Metal-support interactions are desired to optimize the catalytic turnover on metals. Herein, the enhanced interactions by using a Mo2C nanowires support were utilized to modify the charge density of an Ir surface, accomplishing the selective hydrogenation of α,β-unsaturated aldehydes on negatively charged Irδ− species. The combined experimental and theoretical investigations showed that the Irδ− species derive from the higher work function of Ir (vs. Mo2C) and the consequently electron transfer. In crotonaldehyde hydrogenation, Ir/Mo2C delivered a crotyl alcohol selectivity as high as 80 %, outperforming those of counterparts (<30 %) on silica. Moreover, such electronic metal-support interactions were also confirmed for Pt and Au, as compared with which, Ir/Mo2C was highlighted by its higher selectivity as well as the better activity. Additionally, the efficacy for various substrates further verified our Ir/Mo2C system to be competitive for chemoselective hydrogenation. [ABSTRACT FROM AUTHOR]

The space-confined growth by in-situ formed polysaccharides during hydrothermal process is successfully employed to fabricate ultrathin MoS 2 nanosheets, which further evolve to MoS 2 /C evenly integrating nanosheets (2–4 nm) with conducting carbon after carbonization. The MoS 2 /C exhibits an excellent activity for hydrogen evolution reaction (HER) with a small onset overpotential of ∼80 mV and a high current density of 88 mA cm −2 at η = 200 mV, which is associated with the enriched rim-sites on ultrathin MoS 2 and the improved conductivity by carbon matrix. This work demonstrates that the ultrathin MoS 2 nanosheets within carbon, possessing synergistically-enhanced activity and conductivity for HER, are feasible through the space-confined growth based on polysaccharide matrix, and this would open up new opportunities for exploiting highly efficient electrocatalysts. [ABSTRACT FROM AUTHOR]

[Display omitted] • Interfacial engineering of Ag-Pd alloy promoted electrochemical biosensing. • Structure-dependence was ascribed to co-tuned electronic configurations and active surface. • Channel-rich Ag1Pd3 alloys served as a versatile platform for sensing. Noble-metal nanostructures are promising for biosensing applications owing to their fantastic physicochemical properties, but the rational design of their easy-accessible and reactive surface is still challenging. This work is devoted to the interfacial engineering of Ag-Pd alloys, including tuning alloy composition and geometric structure, to promote the electrochemical biosensing performance. Through a co-tuning tactic with controlled reduction, channel-rich Ag 1 Pd 3 alloys with optimal electronic configurations and accessible active surface are successfully obtained, which afford high sensitivity, outstanding selectivity and excellent repeatability to detect H 2 O 2 and glucose biomarkers. As experimentally and theoretically evidenced, tailoring the composition of Ag-Pd alloys ameliorates electronic configurations due to ligand effects, which can optimize the binding with the key intermediate of OH*, and thereby boost electrochemical kinetic steps on surface. Meanwhile, tuning geometric structure with abundant channels enables fast transport of analytes toward largely-exposed active sites. Providing an atomic-level interpretation of structure-dependent biosensing, this work is anticipated to offer guidelines for the development of efficient sensing platforms. [ABSTRACT FROM AUTHOR]

Abstract: Both glial cell line-derived neurotrophic factor (GDNF) and brain-derived neurotrophic factor (BDNF) can protect nigrostriatal dopaminergic neurons from neurotoxins in rodent and monkey models of Parkinson''s disease (PD). These two neurotrophic factors are usually tested individually. This study was designed to compare GDNF, BDNF, or both, for their capabilities to correct behavioral deficits and protect nigrostriatal dopaminergic neurons in a rat model of PD. Gene transfer used a helper virus-free Herpes Simplex Virus (HSV-1) vector system and a modified neurofilament heavy gene promoter that supports long-term expression in forebrain neurons. Rats received unilateral intrastriatal injections of HSV-1 vectors that express either GDNF or BDNF, or both vectors, followed by intrastriatal injections of 6-hydroxydopamine (6-OHDA). Recombinant GDNF or BDNF was detected in striatal neurons in rats sacrificed at 7 months after gene transfer. Of note, GDNF was significantly more effective than BDNF for both correcting behavioral deficits and protecting nigrostriatal dopaminergic neurons. Expression of both neurotrophic factors was no more effective than expression of only GDNF. These results suggest that GDNF is more effective than BDNF for correcting the rat model of PD, and that there are no detectable benefits from expressing both of these neurotrophic factors. [Copyright &y& Elsevier]

[Display omitted] • All coatings could enhance quality and durability of rotary blades. • TiAlN and CrN coated blades showed better mechanical properties. • Self-lubricating endow PTFE based coatings with good wear and anti-adhesion. • PTFE coating is more economically method to extend service life of blade. Coating is an effective method to enhance the surface properties of rotary tillage blades. In order to improve the wear resistance and anti-adhesive properties of rotary blades, four different materials TiAlN, CrN, PTFE and Ni-P-PTFE were selected to modified original blades. The mechanical properties, X-ray diffraction (XRD), wear performance, scanning electron microscopy (SEM) with energy dispersive spectroscopy (EDS), soil cutting resistance were tested and analyzed to investigate wear mechanism and evaluate the improvement of tribological and anti-adhesive properties of different coating methods. The 14 days field test was carried on to verify the experimental results. The results showed that metal coatings (TiAlN, CrN) had higher flexural strength and hardness than plastic coatings (PTFE based coatings). All coated blades possess better wear and anti-adhesive properties. PTFE based coating had better wear resistance, and Ni-P-PTFE coating had the lowest the average friction coefficient (0.32) and the lowest weight loss rate (0.4 g/ha) after 14 days operating in the field. And the Ni-P-PTFE coated blade also had the lowest soil cutting resistance. Combined with economic analysis, PTFE coating is more suitable and economically method to improve the wear resistance and anti-adhesive properties of rotary blades, and further extended their service life. [ABSTRACT FROM AUTHOR]

• N2 Plasma is introduced to surface engineer MoP electrocatalysts. • Electronic modulation due to N-doping obviously promotes alkaline HER. • The facilitated OH* desorption accounts for fast water dissociation and thereby HER. Surface engineering boosts electrocatalytic hydrogen evolution reaction (HER), and more importantly serves as a key platform to uncover catalytic mechanism. Herein, we use plasma treatment under N 2 or Ar to engineer MoP for alkaline HER. Beyond the reduced particle size (in both Ar and N 2 cases), the N 2 plasma treatment further results in N-doping into MoP, which enriches Mo-P active species and causes electron localization near doped sites. Accordingly, water dissociation is promoted thanks to the facilitated OH* desorption, leading to remarkable improvement in alkaline HER. The optimal N-doped MoP accomplishes high performance in 1.0 M KOH, with a low η 10 (overpotential at a current density of -10 mA cm geo −2) of 70 mV and a low Tafel slope of 55 mV dec-1, which is superior to most of Pt-free counterparts. Providing atomic-level insight into the structure-activity relationship on engineered surface, this work will open up new opportunities for electrocatalyst design. [ABSTRACT FROM AUTHOR]

• Hierarchical Mo 2 C@MoS 2 is developed as an efficient biosensing platform. • Mo 2 C@MoS 2 affords superior H 2 O 2 sensing performance to previous materials. • FA-modified Mo 2 C@MoS 2 can sensitively and specifically detect cancer cells. Heterostructures hierarchically integrating various building blocks are promising to construct sensitive and versatile biosensing platforms. Herein, hierarchical Mo 2 C@MoS 2 consisting of interlayer-expanded MoS 2 nanosheets wrapping on Mo 2 C nanorods is developed as a sensitive and bifunctional electrochemical platform to detect cellular metabolism products (e.g., H 2 O 2) and cancer cells. Utilizing the merits of one-dimensional Mo 2 C axis (e.g., high conductivity) and two-dimensional MoS 2 nanosheets (e.g., enhanced *OH binding, highly exposed edge-sites, and tolerance against oxidative H 2 O 2), the Mo 2 C@MoS 2 afford a high sensitivity (1080 μA mM−1 cm-2) and a low detection limit (0.2 μM) for H 2 O 2 sensing, superior to the most of materials free from enzymes and noble metals. Its outstanding tolerance to various interferents ensures the practical monitoring of the intracellular H 2 O 2 amount in MDA-MB-231, a human breast cancer cell line, which provides an indirect but available detection of tumor cells. As a versatile sensing platform, moreover the Mo 2 C@MoS 2 with rich surface amino groups performs well to directly and specifically detect MDA-MB-231 after immobilizing folic acid. This work is anticipated to open up new opportunities toward high-performance sensing materials via surface/interfacial engineering on heterostructures. [ABSTRACT FROM AUTHOR]

The authors describe a dual-mode (colorimetric-fluorometric) nanoprobe for H2O2 that was fabricated by covering molybdenum disulfide nanosheets (MoS2 NS) with ortho-phenylenediamine (OPD). The probe (OPD-MoS2 NS) was applied to the optical determination of H2O2, to the quantitation of cell numbers, and to the detection of intracellular concentrations of H2O2. Oxidation by H2O2 leads to a colored and fluorescent product (oxidized OPD) with absorption/excitation/fluorescence peaks at 450/450/557 nm. The nanoprobe can detect H2O2 in down to 500 nM concentrations, and HeLa cells at levels of 100 cells mL−1. The detection limit for intracellular H2O2 is in the 5.5 to 12.6 μM concentration range when the method is applied to cells at levels of 102-106 cells mL−1. Due to its good biocompatibility and easy cell uptake, the nanoprobe also permits sensitive fluorometric imaging of intracellular H2O2. It can also comparatively discriminate the change of intracellular oxidation state in living cancerous and normal cells.A dual-mode (colorimetric-fluorometric) detection nanoplatform based on OPD-modified MoS2 nanosheets is used to quantitatively detect H2O2, cell numbers and intracellular H2O2. The MoS2 nanoprobes also permit sensitive fluorescence imaging of intracellular H2O2, and can discriminate intracellular oxide states in living cancerous and normal cells. [ABSTRACT FROM AUTHOR]

The Front Cover shows the efficient and selective hydrogenation of functionalized nitroarenes to corresponding anilines on bimetallic Pt‐Sn supported by hydrogenated MoOx. In their Full Paper, Y. J. Shu et al. demonstrate that Pt‐Sn/H‐MoOx catalysts deliver high selectivity and activity for the hydrogenation of functionalized nitroarenes under mild conditions, as a result of the atom‐rearranged bimetallic Pt‐Sn surface and the electronic metal–support interactions with H‐MoOx, respectively. More information can be found in the Full Paper by Y. J. Shu et al. on page 4199 in Issue 22, 2017 (DOI: 10.1002/cctc.201700880). [ABSTRACT FROM AUTHOR]

The front cover artwork for Issue 22/2017 is provided by the groups of Qingsheng Gao from Jinan University (China) and Yi Tang from Fudan University (China). The image shows a fast car driving in the right direction with meters indicating that the hydrogenation of functionalized nitroarenes is accelerated and directed by Pt-Sn/H-MoO x . See the Full Paper itself at . [ABSTRACT FROM AUTHOR]

Effective electron modulation on metal‐carbides is essential for exploring noble‐metal‐free electrocatalysts for hydrogen evolution reactions (HER). On page 5590, Y. Tang, Q. S. Gao, and co‐workers report an effective cobalt‐doping to increase the electron density around Fermi level in Mo2C nanowires, accomplishing high activity, striking kinetic metrics and good durability for HER in both acidic and basic electrolytes. [ABSTRACT FROM AUTHOR]