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Self‐Templating Construction of Hollow Amorphous CoMoS 4 Nanotube Array towards Efficient Hydrogen Evolution Electrocatalysis at Neutral pH
Author(s) -
Wang Weiyi,
Ren Xiang,
Hao Shuai,
Liu Zhiang,
Xie Fengyu,
Yao Yadong,
Asiri Abdullah M.,
Chen Liang,
Sun Xuping
Publication year - 2017
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201702923
Subject(s) - overpotential , electrocatalyst , electrochemistry , catalysis , nanotube , chemical engineering , carbon nanotube , materials science , hydrogen , amorphous solid , adsorption , electrode , water splitting , reversible hydrogen electrode , nanotechnology , inorganic chemistry , chemistry , crystallography , working electrode , organic chemistry , engineering , photocatalysis
Environmentally friendly electrochemical hydrogen production needs the development of earth‐abundant catalyst materials for the hydrogen evolution reaction with high activity and durability at neutral pH. In this work, the self‐templating construction of a hollow amorphous CoMoS 4 nanotube array on carbon cloth (CoMoS 4 NTA/CC) is reported, using hydrothermal treatment of a Co(OH)F nanowire array on CC in (NH 4 ) 2 MoS 4 solution. When used as a 3D electrode for hydrogen evolution electrocatalysis, the resulting CoMoS 4 NTA/CC demonstrates superior catalytic activity and strong long‐term electrochemical durability in 1.0 M phosphate buffer solution (pH=7). It shows small onset overpotential of 21 mV and requires low overpotentials of 104 and 179 mV to drive geometrical current densities of 10 and 50 mA cm −2 , respectively. Density functional theory calculations suggest that CoMoS 4 has a more favorable hydrogen adsorption free energy than Co(OH)F.