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Updated: Aug 23, 2025

A Simple, Low-cost, and Robust System to Measure the Volume of Hydrogen Evolved by Chemical Reactions with Aqueous Solutions
Published on: August 17, 2016
Phase transition in V-doped cobalt hydroxide for a superior alkaline hydrogen evolution reaction
Mengmeng Shao1, Haodeng Chen1, Yongyong Cao2
1School of Materials Science and Engineering, Dongguan University of Technology, Dongguan 523808, China. shaomm@dgut.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).
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