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†

Mengmeng Shao,

*^a Haodeng Chen,^a Yongyong Cao,*^b Shushu Fu,^c Shiji Hao,^a Min Chen,^a Jutao Jin,^a Wenlong Wang,

^a Yunhui Wu

^a and Lifeng Cui*^d

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* Corresponding authors

^a School of Materials Science and Engineering, Dongguan University of Technology, Dongguan 523808, China
E-mail: shaomm@dgut.edu.cn

^b College of Biological, Chemical Science and Engineering, Jiaxing University, Jiaxing 314001, China
E-mail: cyy@zjxu.edu.cn

^c School of Environment and Civil Engineering, Dongguan University of Technology, Dongguan 523808, China

^d College of Smart Energy, Shanghai Jiao Tong University, Shanghai 200240, China
E-mail: cui_lifeng@sjtu.edu.cn

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).

Chemical Communications

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

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

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