Rational design of precatalysts and controlled evolution of catalyst-electrolyte interface for efficient hydrogen production

Zhu, Anquan; Qiao, Lulu; Liu, Kai; Gan, Guoqiang; Luan, Chuhao; Lin, Dewu; Zhou, Yin; Bu, Shuyu; Zhang, Tian; Liu, Kunlun; Song, Tianyi; Liu, Heng; Li, Hao; Guo, Hong; Zhang, Wenjun

doi:10.1038/s41467-025-57056-6

articleNature CommunicationsFeb 22, 2025GOLD OA

Rational design of precatalysts and controlled evolution of catalyst-electrolyte interface for efficient hydrogen production

AZAnquan Zhu LQLulu Qiao KLKai Liu GGGuoqiang Gan CLChuhao Luan

City University of Hong Kong · University of Macau · +3 more institutions

PubMed

Indexed incrossrefdoajpubmed

Abstract

The concept of precatalyst is widely accepted in electrochemical water splitting, but the role of precatalyst activation and the resulted changes of electrolyte composition is often overlooked. Here, we elucidate the impact of potential-dependent changes for both precatalyst and electrolyte using Co2Mo3O8 as a model system. Potential-dependent reconstruction of Co2Mo3O8 precatalyst results in an electrochemically stable Co(OH)2@Co2Mo3O8 catalyst and additional Mo dissolved as MoO42− into electrolyte. The Co(OH)2/Co2Mo3O8 interface accelerates the Volmer reaction and negative potentials induced Mo2O72− (from MoO42−) further enhances proton adsorption and H2 desorption. Leveraging these insights, the…

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76

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Topics & keywords

Topics

Keywords

Rational design
Catalysis
Electrolyte
Interface (matter)
Production (economics)
Hydrogen production
Hydrogen
Chemistry

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