Self-supported CoMoS4 nanosheet array as an efficient catalyst for hydrogen evolution reac
Self-supported CoMoS4 nanosheet array as an efficient catalyst for hydrogen evolution reaction
at neutral pH
Xiang Ren;Liang Chen;Dan Wu;Ruixiang Ge;Xu Sun;Hongmin Ma;Tao Yan;Yong Zhang;Bin Du;Qin Wei
【期刊名称】《纳米研究(英文版)》 【年(卷),期】2018(011)004
【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.
Self-supported CoMoS4 nanosheet array as an efficient catalyst for hydrogen evolution reac
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