过电位
纳米片
催化作用
法拉第效率
电化学
可逆氢电极
氢
吸附
材料科学
电极
分解水
纳米技术
化学工程
无机化学
化学
物理化学
工作电极
有机化学
工程类
光催化
作者
Xiang Ren,Dan Wu,Ruixiang Ge,Xu Sun,Hongmin Ma,Tao Yan,Yihe Zhang,Bin Du,Qin Wei,Liang Chen
出处
期刊:Nano Research
[Springer Science+Business Media]
日期:2018-03-19
卷期号:11 (4): 2024-2033
被引量:146
标识
DOI:10.1007/s12274-017-1818-6
摘要
Development of earth-abundant electrocatalysts, particularly for high-efficiency hydrogen evolution reaction (HER) under benign conditions, is highly desired, but still remains a serious challenge. Herein, we report a high-performance amorphous CoMoS4 nanosheet array on carbon cloth (CoMoS4 NS/CC), prepared by hydrothermal treatment of a Co(OH)F nanosheet array on a carbon cloth (Co(OH)F NS/CC) in (NH4)2MoS4 solution. As a three-dimensional HER electrode, CoMoS4 NS/CC exhibits remarkable activity in 1.0 M phosphate buffer saline (pH 7), only requiring an overpotential of 183 mV to drive a geometrical current density of 10 mA·cm–2. This overpotential is 140 mV lower than that for Co(OH)F NS/CC. Notably, this electrode also shows outstanding electrochemical durability and nearly 100% Faradaic efficiency. Density functional theory calculations suggest that CoMoS4 has a more favorable hydrogen adsorption free energy than Co(OH)F.
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