首页|Surface reconstruction of heterostructures in alkaline medium towards enhanced electrocatalytic hydrogen evolution

Surface reconstruction of heterostructures in alkaline medium towards enhanced electrocatalytic hydrogen evolution

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Constructing heterostructures has proved to be a successful strategy to fabricate electrocatalysts with high efficiency for water splitting.However,the structure evo-lution in alkaline hydrogen evolution reaction lacks investigation and the specific active center remains dis-putable.Herein,we take the well-designed Ni3S2@VO2 heterostructures as a model to investigate the electrocat-alytic activity and the surface reconstruction process of heterostructure catalysts in alkaline electrolyte.The Ni3S2@VO2 heterostructures,with Ni3S2 nanorods as the core and VO2 nanoflakes as the shell,coupled with the high conductive Ni3S2,the hydrophilic VO2 and modulated electronic structures at the interfaces,exhibited prominent activity and superior stability at various current densities.Further,the ex-situ characterizations confirmed that the surface reconstruction from Ni3S2@VO2 into Ni3S2@amorphous-Ni(OH)2 in alkaline media could opti-mize the water dissociation barrier and exposed large active area,thereby contributing to improved electrocatalytic performance.Our study not only introduces novel high-performance electrocatalysts for hydrogen evolution reaction(HER),but also provides a new avenue for re-examining hetero-structural catalysts in alkaline solutions.

HeterostructuresNi3S2@VO2Surface reconstructionWater dissociationAlkaline hydrogen evolution

Ming-Yang Yang、Ji Yuan、Xue-Lian Fu、Jing-Jing Chen、Jing Hu、Zhou-Guang Lu、Chen Liu

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Guangdong Research Center for Interfacial Engineering of Functional Materials,Shenzhen Key Laboratory of Polymer Science and Technology,Shenzhen Key Laboratory of Energy Electrocatalytic Materials,College of Materials Science and Engineering,Shenzhen University,Shenzhen 518060,China

Shenzhen Key Laboratory of Interfacial Science and Engineering of Materials,Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen 518055,China

Basic and Applied Basic Research Project of Guangdong ProvinceBasic and Applied Basic Research Project of Guangdong ProvinceKey Project of Shenzhen Basic ResearchBasic Research Project of the Science and Technology Innovation Commission of ShenzhenShenzhen Key Laboratory of Interfacial Science and Engineering of Materials中国博士后科学基金

2022A15150114382023A1515011055JCYJ2022081800003006JCYJ20220531101013028ZDSYS202004211114017382022M722168

2024

10.1007/s12598-024-02625-9

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)
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