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Realizing rapid transformation of hydroxide to high‐active oxyhydroxide species in layered double hydroxide (LDH) catalyst plays a significant role in enhancing its activity toward oxygen evolution reaction (OER) for hydrogen production from water. Here, a scalable strategy is developed to synthesize defect‐rich few‐layered NiFe‐LDH nanosheets (f‐NiFe‐LDH‐B) with in situ borate modified for boosted and stable OER due to that the borate can narrow the bandgap for Ni sites to realize a more conductive electronic structure. Besides, the adsorbed borate can tune the d band center of Ni sites to promote of hydroxide transformation and facilitate the adsorption of the OER intermediates. The f‐NiFe‐LDH‐B catalyst, therefore, requires only 209 and 249 mV overpotential to deliver 10 and 100 mA cm−2 OER, respectively, with a Tafel slope of 43.5 mV dec−1. Moreover, only 1.8 V cell voltage is required to reach Ampere‐level overall water splitting for 500 h at room temperature. [ABSTRACT FROM AUTHOR]

A facile ion exchange strategy to fabricate CoIrx–BDC with atomically dispersed Ir is developed towards overall water splitting. The optimized CoIr3–BDC requires only 12 and 81 mV to deliver 10 and 100 mA cm−2 alkaline HER, respectively, and only 245 mV to reach 100 mA cm−2 alkaline OER. [ABSTRACT FROM AUTHOR]

The application of heteroatom-doped graphene for photochemical and electrochemical reactions is primarily hindered by the lack of a controllable and facile synthesis strategy. In this work, few-layer CoN-graphene (1.8 nm thickness) with atomic Co has been fabricated via pyrolysis exfoliation. The half wave potential of CoN-graphene reaches 0.875 V vs. RHE, and the corresponding direct methanol fuel cell performance is 100% (higher than that of the commercial Pt/C catalyst), demonstrating potential for practical application in energy conversion devices. [ABSTRACT FROM AUTHOR]

Industrial application of hydrogen generation from water electrolysis is hindered by the strong dependence of cathodic hydrogen evolution reaction (HER) on Pt catalyst. Herein, this study designs a facile strategy to engine heterointerfaces of Pt and Mo2C to boost the HER catalytic activity and enhance the Pt utilization by considering the catalytic ability of Mo2C toward water dissociation reaction. Co is employed to assist the stable Pt/Mo2C heterointerface engineering as self‐confinement agent. By considering the catalytic ability of metallic Co, carbon cages are in‐situ generated around the CoPt/Mo2C nanoparticles to obtain the CoPt‐Mo2C@C catalyst. Overpotential to deliver 100 mA cm‐2 alkaline HER for CoPt‐Mo2C@C is therefore low to 153 mV while Pt content in CoPt‐Mo2C@C is low to 2.8 wt.%. Pt utilization of CoPt‐Mo2C@C toward alkaline HER catalysis is therefore enhanced by 12 times compared with the commercial Pt/C catalyst, demonstrating the potential for practical applications. [ABSTRACT FROM AUTHOR]

Large-scale hydrogen production from industrial electrolysis technology is challenged by sluggish hydrogen evolution reaction (HER) kinetics under alkaline conditions, even with Pt as catalyst. In consideration of the synergistic effects of Ru on water dissociation and Ru2P on proton reduction, Ru/Ru2P interfaces were engineered in situ via a high-pressure phosphorization strategy with phosphine as both a phosphorus source and reactant. The Ru/Ru2P-loaded P-doped carbon (Ru–Ru2P/PC) catalyst therefore exhibited superior alkaline HER activity compared to the Pt catalyst. The overpotential of the Ru–Ru2P catalyst to drive a 50 mA cm−2 alkaline HER was reduced by 65 mV compared to the Pt/C catalyst, and the loading of noble metal was much lower. Thus, the mass activity was doubled. With its great stability under alkaline conditions, the easily synthesized Ru–Ru2P catalyst shows promising application potential in industrial electrolysis systems. [ABSTRACT FROM AUTHOR]