Heterophase junction engineering-induced Co spin-state modulation of CoSe2 for large-current hydrogen evolution reaction

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外文摘要：Efficient electrocatalysts are vital to large-cur-rent hydrogen production in commercial water splitting for green energy generation.Herein,a novel heterophase engineering strategy is described to produce polymorphic CoSe2 electrocatalysts.The composition of the electrocat-alysts consisting of both cubic CoSe2(c-CoSe2)and orthorhombic CoSe2(o-CoSe2)phases can be controlled precisely.Our results demonstrate that junction-induced spin-state modulation of Co atoms enhances the adsorption of intermediates and accelerates charge transfer resulting in superior large-current hydrogen evolution reaction(HER)properties.Specifically,the CoSe2-based heterophase cat-alyst with the optimal c-CoSe2 content requires an over-potential of merely 240 mV to achieve 1,000 mA·cm-2 as well as a Tafel slope of 50.4 mV·dec-1.Furthermore,the electrocatalyst can maintain a large current density of 1,500 mA·cm-2 for over 320 h without decay.The results reveal the advantages and potential of heterophase junction engineering pertaining to design and fabrication of low-cost transition metal catalysts for large-current water splitting.

外文关键词：

Heterophase junctionSpin-stateHydrogen evolution reactionLarge current electrochemical hydrogen productionWater splitting

作者：

Bao-Chai Xu、Ya-Ping Miao、Min-Qin Mao、Dong-Lian Li、Song Xie、Wei-Hong Jin、Shu Xiao、Jing Wen、Zaenab Abd-Allah、Zhi-Tian Liu、Xiang Peng、Paul K.Chu

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作者单位：

Hubei Key Laboratory of Plasma Chemistry and Advanced Materials,School of Materials Science and Engineering,Wuhan Institute of Technology,Wuhan 430205,China

School of Textile Science and Engineering,Xi'an Polytechnic University,Xi'an 710048,China

Institute of Advanced Wear and Corrosion Resistant and Functional Materials,Jinan University,Guangzhou 510632,China

Institute of Safety Science and Engineering,South China University of Technology,Guangzhou 510641,China

Department of Engineering,Manchester Metropolitan University,Manchester M15 6BH,UK

Department of Physics,Department of Materials Science and Engineering,and Department of Biomedical Engineering,City University of Hong Kong,Hong Kong 999077,China

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基金：

国家自然科学基金国家自然科学基金湖北省重点研发计划Knowledge Innovation Program of Wuhan-Shuguang ProjectCity University of Hong Kong Donation Research GrantCity University of Hong Kong Donation GrantCity University of Hong Kong Strategic Research Grant(SRG)

项目编号：

52002294522021112021BAA2082022010801020364DON-RMG 922902192200617005505

出版年：

2024

DOI：

10.1007/s12598-024-02624-w

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(6)

参考文献量3