首页|One-step controlled electrodeposition nickel sulfides heterointerfaces favoring the desorption of hydroxyl groups for efficient hydrogen generation

One-step controlled electrodeposition nickel sulfides heterointerfaces favoring the desorption of hydroxyl groups for efficient hydrogen generation

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The heterointerface engineering involving dif-ferent components or phases represents a desirable strategy for enhancing the sluggish kinetics of hydrogen evolution reaction(HER).However,constructing desired heteroint-erfaces and elucidating the reaction mechanisms on the interface remains a considerable challenge.In this work,we propose a straightforward electrochemical synthesis strategy to prepare the nickel sulfide-based heterointerfaces for HER.The mechanism of electrochemical synthesis is revealed,wherein metal-thiourea species can be formed at the cathode potential and subsequently oxidized to nickel sulfides at the anode potentials.Leveraging this mechanism,a range of nickel sulfides,including NiS,Ni3S2/NiS,Ni/Ni3S2 and Ni3S2,have been successfully synthesized by tuning the potential range of cyclic voltammetry.Among these,the obtained Ni3S2/NiS@CC(CC:carbon cloth)exhibits the smallest overpotential of 84 mV at 10 mA·cm-2 and high stability.Theoretical calculations further reveal that the combination of NiS and Ni3S2 induces electron redistribution at the interface,and thus the Volmer process is effectively promoted with faster water dissociation and OH desorption kinetics.Signifi-cantly,the simplicity method coupled with a clear syn-thesis mechanism and outstanding HER performance highlights its promising potential for practical applications.

Hydrogen evolution reactionHeterointerfacesOH desorption kineticsElectrochemical synthesis

Ru-Chun Li、Xin-Yue Zhang、Ze-Yue Qu、Feng-Yi Liu、Quan-Qing Xu、Zhao-Xia Hu、Jing-Wei Li、Mohamed-Nawfal Ghazzal、Jin-Li Yu

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Faculty of Chemistry and Chemical Engineering,Yunnan Normal University,Kunming 650500,China

Foshan Gaoke Hechuang Technology Co.,Ltd.,Foshan 528200,China

School of Chemistry and Chemical Engineering,Guangzhou University,Guangzhou 510006,China

Université Paris-Saclay,UMR 8000 CNRS,Institut de Chimie Physique,Orsay 91405,France

Department of Chemistry,City University of Hong Kong,Hong Kong 999077,China

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National Natural Science Foundation of ChinaGuangdong Basic and Applied Basic Research FoundationYunnan Fundamental Research Projects

222020422022A1515140012202401CF070036

2024

10.1007/s12598-024-02806-6

稀有金属(英文版)
中国有色金属学会

稀有金属(英文版)

CSTPCDEI
影响因子：0.801
ISSN：1001-0521
年,卷(期)：2024.43(9)
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