Phase transition in V-doped cobalt hydroxide for a superior alkaline hydrogen evolution reaction

Mengmeng Shao; Haodeng Chen; Yongyong Cao; Shushu Fu; Shiji Hao; Min Chen; Jutao Jin; Wenlong Wang; Yunhui Wu; Lifeng Cui

doi:10.1039/d2cc03371b

Phase transition in V-doped cobalt hydroxide for a superior alkaline hydrogen evolution reaction

Chem Commun (Camb). 2022 Nov 17;58(92):12859-12862. doi: 10.1039/d2cc03371b.

Authors

Mengmeng Shao¹, Haodeng Chen¹, Yongyong Cao², Shushu Fu³, Shiji Hao¹, Min Chen¹, Jutao Jin¹, Wenlong Wang¹, Yunhui Wu¹, Lifeng Cui⁴

Affiliations

¹ School of Materials Science and Engineering, Dongguan University of Technology, Dongguan 523808, China. shaomm@dgut.edu.cn.
² College of Biological, Chemical Science and Engineering, Jiaxing University, Jiaxing 314001, China. cyy@zjxu.edu.cn.
³ School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan 523808, China.
⁴ College of Smart Energy, Shanghai Jiao Tong University, Shanghai 200240, China. cui_lifeng@sjtu.edu.cn.

PMID: 36317636
DOI: 10.1039/d2cc03371b

Abstract

Herein, V-doped cobalt hydroxides grown on carbon cloth (V-Co(OH)₂/CC) were prepared via hydrothermal method. The incorporation of V can trigger phase transition and tune the local electronic structure of Co(OH)₂, thereby improving the intrinsic alkaline HER activity. We find that the V-Co(OH)₂ dominated by β-Co(OH)₂ exhibits excellent HER activity with only 83 mV overpotential at a current density of 10 mA cm^-2, which outperforms most reported hydroxide-based catalysts and even surpasses the commercial Pt/C at large current density (>160 mA cm^-2).