摘要
Constructing heterostructures has proved to be a successful strategy to fabricate electrocatalysts with high efficiency for water splitting.However,the structure evolution in alkaline hydrogen evolution reaction lacks investigation and the specific active center remains disputable.Herein,we take the well-designed Ni_(3)S_(2)@VO_(2) heterostructures as a model to investigate the electrocatalytic activity and the surface reconstruction process of heterostructure catalysts in alkaline electrolyte.The Ni_(3)S_(2)@VO_(2) heterostructures,with Ni_(3)S_(2) nanorods as the core and VO_(2) nanoflakes as the shell,coupled with the high conductive Ni_(3)S_(2),the hydrophilic VO_(2) 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 Ni_(3)S_(2)@VO_(2) into Ni_(3)S_(2)@amorphous-Ni(OH)_(2) in alkaline media could optimize 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.
出处
《Rare Metals》
SCIE
EI
CAS
CSCD
2024年第6期2636-2647,共12页
稀有金属（英文版）
基金
financially supported by Basic and Applied Basic Research Project of Guangdong Province(Nos.2022A1515011438 and 2023A1515011055)
Key Project of Shenzhen Basic Research(No.JCYJ2022081800003006)
Basic Research Project of the Science and Technology Innovation Commission of Shenzhen(No.JCYJ20220531101013028)
Shenzhen Key Laboratory of Interfacial Science and Engineering of Materials(No.ZDSYS20200421111401738)
China Postdoctoral Science Foundation(No.2022M722168)。
作者简介
Chen Liu,e-mail:liuchen@szu.edu.cn;Zhou-Guang Lu,e-mail:luzg@sustech.edu.cn。
