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Hydrogen evolution reaction (HER) in alkaline medium plays an important role in producing green hydrogen but suffers from sluggish reaction kinetics owing to additional water dissociation step. Extensive research interest has been placed on engineering dual active sites (i.e., water-dissociation sites and hydrogen-adsorption/recombination sites) within a catalyst to enhance the HER activity. This article reviews recent progress in developing alkaline HER catalysts with high-efficiency dual active sites via strategies of heterogeneous interfaces constructing and heteroatoms doping or alloying. The latest advances in the component design, synthetic strategy, catalytic performance, and mechanistic understanding are discussed with selective examples of the hybrid between metal/alloy or metal phosphide/nitride/sulfide and transition metal hydroxides, oxyhydroxide or bicarbonates. Furthermore, remaining challenges and perspectives in the field of dual-site engineering are highlighted for future development of better alkaline HER electrocatalysts.


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Dual active sites engineering of electrocatalysts for alkaline hydrogen evolution

Show Author's information Wankun Gou1Hongming Sun1( )Fangyi Cheng2( )
Tianjin Key Laboratory of Structure and Performance for Functional Molecules, College of Chemistry, Tianjin Normal University, Tianjin 300387, China
College of Chemistry, Nankai University, Tianjin 300071, China

Abstract

Hydrogen evolution reaction (HER) in alkaline medium plays an important role in producing green hydrogen but suffers from sluggish reaction kinetics owing to additional water dissociation step. Extensive research interest has been placed on engineering dual active sites (i.e., water-dissociation sites and hydrogen-adsorption/recombination sites) within a catalyst to enhance the HER activity. This article reviews recent progress in developing alkaline HER catalysts with high-efficiency dual active sites via strategies of heterogeneous interfaces constructing and heteroatoms doping or alloying. The latest advances in the component design, synthetic strategy, catalytic performance, and mechanistic understanding are discussed with selective examples of the hybrid between metal/alloy or metal phosphide/nitride/sulfide and transition metal hydroxides, oxyhydroxide or bicarbonates. Furthermore, remaining challenges and perspectives in the field of dual-site engineering are highlighted for future development of better alkaline HER electrocatalysts.

Keywords: electrocatalysts, water dissociation, hydrogen adsorption, alkaline hydrogen evolution, dual active sites

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Publication history

Received: 18 February 2024
Revised: 25 March 2024
Accepted: 26 March 2024
Published: 18 April 2024

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© The Author(s) 2024. Published by Tsinghua University Press.

Acknowledgements

Acknowledgements

This work was supported by MOST (2022YFA1504001) and the National Funds for Distinguished Young Scholar (21925503).

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