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• W4206055153 endingPage "134795" @default.
• W4206055153 startingPage "134795" @default.
• W4206055153 abstract "A bifunctional sheet-like Co 2 N 0.67 /CoMoO 4 arrays on carbon cloth is constructed by a rational design and controllable synthetic methods. The resulted catalyst can provide highly active and stable performance for hydrogen/oxygen evolution reactions (HER/OER) in alkaline electrolytes. Density functional theory (DFT) calculations certify that the interface between Co 2 N 0.67 and CoMoO 4 components can optimize the energy barrier of reaction intermediates, thereby improving the catalytic performance of HER and OER in overall water splitting and Zn-H 2 O cell. • Co 2 N 0.67 /CoMoO 4 nanosheets electrocatalysts are synthesized through hydrothermal process and nitriding treatment. • DFT calculation revealed a significant charge accumulation at the interface between Co 2 N 0.67 and CoMoO 4 . • Co 2 N 0.67 /CoMoO 4 catalyst exhibits high catalytic activity and robust stability towards HER/OER. • The Co 2 N 0.67 /CoMoO 4 is promising candidate to replace the Pt based cathodic catalyst in Zn-H 2 O cells. The key in developing a low-cost, high-efficiency electrocatalyst for hydrogen generation is not only cutting the cost by avoiding noble metals but also utilizing the structure–function relationship to expose the maximum amounts of active sites on the surface by increasing the interface between the active components. Here, we demonstrated full-cycle synthesis, characterization, and optimization of Co 2 N 0.67 /CoMoO 4 electrocatalyst on carbon-supported by density functional theory (DFT) calculations. The DFT calculation revealed a significant charge accumulation at the interface between Co 2 N 0.67 and CoMoO 4 , suggesting the possibility of a strong synergy. As expected, electrochemical studies have shown a bifunctional Co 2 N 0.67 /CoMoO 4 catalyst with low overpotential and durability towards hydrogen/oxygen evolution reactions (HER/OER) in alkaline electrolytes and robust overall water splitting performance at high current densities. In addition, the optimized Co 2 N 0.67 /CoMoO 4 catalyst is also used in a Zn-H 2 O cell and displayed a power density exceeding Pt/C with the long-term stability of up to 170 h. The excellent electrochemical performance is the outcome of the better charge mobility at the interface resulted in the unique synergy between the active components." @default.
• W4206055153 created "2022-01-26" @default.
• W4206055153 creator A5005156382 @default.
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• W4206055153 date "2022-05-01" @default.
• W4206055153 modified "2023-09-23" @default.
• W4206055153 title "Interface engineering of Co2N0.67/CoMoO4 heterostructure nanosheets as a highly active electrocatalyst for overall water splitting and Zn-H2O cell" @default.
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• W4206055153 doi "https://doi.org/10.1016/j.cej.2022.134795" @default.
• W4206055153 hasPublicationYear "2022" @default.
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