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Cerium-based compounds hold great promise for applications in the field of catalysis and energy due to their synergetic electrochemical performance. Herein, a novel two-dimensional (2D) Gd decorated CeO 2 /Ce(OH)CO 3 nanohybrid has been prepared by a one-step hydrothermal method and pioneered as an efficient and stable electrocatalyst for OER. Interestingly, the content of Ce(OH)CO 3 , morphology, and oxygen vacancies of CeO 2 /Ce(OH)CO 3 nanohybrids can be controlled by changing the amount of Gd doping. Among them, the 2% Gd-doped CeO 2 /Ce(OH)CO 3 nanosheet demonstrates dramatically enhanced oxygen evolution reaction (OER) performances with a low overpotential of 292 mV at 10 mA cm−2 and possesses excellent stability over 40 h, outperforming some recently reported Ceria-based OER catalysts. Our findings provide a possible way to develop new electrocatalysts with excellent OER abilities for energy conversion applications. Incorporated Gd into the lattice of CeO 2 /Ce(OH)CO 3 nanohybrid results in the content of Ce(OH)CO 3 , morphology, and oxygen vacancies can be controlled, then accelerates the OER with a low overpotential of 292 mV at 10 mA cm−2 and possesses excellent stability over 40 h. [Display omitted] • A novel Gd decorated CeO 2 /Ce(OH)CO 3 /CF electrocatalyst has been prepared. • The content of Ce(OH)CO 3 , morphology, and oxygen vacancies can be modulated by controlling Gd doping amount. • The optimal 2% Gd- CeO 2 /Ce(OH)CO 3 /CF requires 292 mV to deliver 10 mA cm−2. [ABSTRACT FROM AUTHOR]

[Display omitted] • Inducing lattice distortion in NiFe-LDH nanosheets by Ce-doping towards accelerating electrocatalytic oxygen evolution reaction. • The optimal NiFeCe-LDH@CP only requires 267 mV to deliver 100 mA cm−2, which is 41 mV lower than pure NiFe-LDH@CP. • NiFeCe-LDH@CP have retained their structural property after 70 h stability. • DFT calculations reveal that lattice distortion could optimize the electronic structure of the Ni element in active sites and lower the energy barrier, thus accelerating the OER. Nickel-iron layered double hydroxide (NiFe-LDH) is a promising active electrocatalyst for oxygen evolution reaction (OER). However, the development of NiFe-LDH is limited by poor electrical conductivity and inferior cycling stability. Herein, we present a structural perturbation and distinct distorted lattice strategy via Ce doping in NiFe-LDH on carbon paper (CP) (NiFeCe-LDH@CP) to boost its OER performance. Lattice distortion results in a large accessible surface area and induces more O vac , accelerating the OER by modifying the intrinsic electronic structure and optimizing the adsorption energy of intermediates. As a result, the optimized NiFeCe-LDH@CP possesses excellent stability over 70 h and can deliver the current density of 100 mA/cm2 with the overpotentials of only 267 mV, which is 41 mV lower than pure NiFe-LDH@CP. Theoretical calculations indicate that the introduction of lattice distortion into NiFe-LDH could optimize the electronic structure of the Ni element in active sites and lower the energy barrier, thus leading to a significant increase in OER activity. This work figures out the effect of lattice distortion strategy on the improvement of OER performance, which opens new perspectives on the development of defect-rich OER electrocatalysts. [ABSTRACT FROM AUTHOR]

[Display omitted] Multinary metal sulfides (MMSs) are highly suitable candidates for the application of electrocatalysis as they offer numerous parameters for optimizing the electronic structure and catalytic sites. Herein, a stable nanoarchitecture consisting of MMSs ((NiCoCrMnFe)S x) nanoparticles embedded in S, N-codoped carbon (SNC) layers derived from metal organic framework (MOF) and supported on carbonized wood fibers (CWF) was fabricated by directly carbonization. Benefiting from this carbon-coated configuration, along with the synergistic effects within multinary metal systems, (NiCoCrMnFe)S x @SNC/CWF delivers an exceptionally low overpotential of 260 mV at a high current density of 1000 mA cm−2, a small Tafel slope of 48.5 mV dec−1, and robust electrocatalytic stability. Furthermore, the (NiCoCrMnFe)S x @SNC/CWF used as the cathode of rechargeable Zn-air batteries demonstrates higher power density and remarkable durability, surpassing that of commercial RuO 2. Thus, we showcase the feasibility and advantages of employing highly efficient and durable MMSs materials for low-cost and sustainable energy conversion. [ABSTRACT FROM AUTHOR]

Decoupling the scaling relation of intermediates is an effective strategy to improve the oxygen evolution reaction (OER) catalytic efficiency. Herein, S-doped carbon-confined Fe.92 Co.08 S nanoparticles (Fe.92 Co.08 S@SC) anchored to S-doped carbonized wood fiber (SCWF) are fabricated via simple synchronous carbonization and sulfidation. Due to the synergistic catalytic effect of bimetallic and the unique structural effect of the supported catalyst, Fe.92 Co.08 S@SC/SCWF exhibit excellent OER catalytic efficiency with an overpotential of 238 mV at 50 mA cm and stability up to 100 h. Furthermore, a high current density of 500 mA cm−2 at an overpotential of 281 mV was achieved. Theoretical calculations and electrochemical characterizations confirm that bimetallic synergies can accelerate the surface reconstruction of Fe.92 Co.08 S@SC with highly efficient OER activity. For zinc–air battery applications, Fe.92 Co.08 S@SC/SCWF exhibits superior power density and stability over commercial RuO 2. This work provides insights into the preparation of supported electrocatalysts with bimetallic synergy for high-efficiency OER. [Display omitted] • Fe.92 Co.08 S@SC/SCWF was prepared by simple synchronous carbonization and sulfidation. • Fe.92 Co.08 S@SC/SCWF has excellent OER catalytic activity and stability. • Bimetallic synergies can accelerate the surface reconstruction of Fe.92 Co.08 S@SC. • The zinc-air battery using Fe.92 Co.08 S@SC/SCWF has excellent performance. [ABSTRACT FROM AUTHOR]