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

Yang，Ming Yang1,2; Yuan，Ji1; Fu，Xue Lian2; Chen，Jing Jing2; Hu，Jing1,2; Lu，Zhou Guang2; Liu，Chen1

2024-06-01

10.1007/s12598-024-02625-9

Rare Metals   影响因子和分区

1001-0521

1867-7185

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 NiS@VO heterostructures as a model to investigate the electrocatalytic activity and the surface reconstruction process of heterostructure catalysts in alkaline electrolyte. The NiS@VO heterostructures, with NiS nanorods as the core and VO nanoflakes as the shell, coupled with the high conductive NiS, the hydrophilic VO 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 NiS@VO into NiS@amorphous-Ni(OH) 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. Graphical abstract: (Figure presented.)

Alkaline hydrogen evolution Heterostructures Ni3S2@VO2 Surface reconstruction Water dissociation

SCI ; EI

英语

其他

MATERIALS SCIENCE

2-s2.0-85188111686

Scopus

1.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
2.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

Yang，Ming Yang,Yuan，Ji,Fu，Xue Lian,et al. Surface reconstruction of heterostructures in alkaline medium towards enhanced electrocatalytic hydrogen evolution[J]. Rare Metals,2024,43(6):2636-2647.

Yang，Ming Yang.,Yuan，Ji.,Fu，Xue Lian.,Chen，Jing Jing.,Hu，Jing.,...&Liu，Chen.(2024).Surface reconstruction of heterostructures in alkaline medium towards enhanced electrocatalytic hydrogen evolution.Rare Metals,43(6),2636-2647.

Yang，Ming Yang,et al."Surface reconstruction of heterostructures in alkaline medium towards enhanced electrocatalytic hydrogen evolution".Rare Metals 43.6(2024):2636-2647.