Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 23, Issue 52, Pages 12718-12723Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201702923
Keywords
CoMoS4 nanotube array; electrocatalysis; hydrogen evolution reaction; neutral PH; self-templating
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Funding
- National Natural Science Foundation of China [21575137]
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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 CoMoS4 nanotube array on carbon cloth (CoMoS4 NTA/CC) is reported, using hydrothermal treatment of a Co(OH)F nanowire array on CC in (NH4)(2)MoS4 solution. When used as a 3D electrode for hydrogen evolution electrocatalysis, the resulting CoMoS4 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 mAcm(-2), respectively. Density functional theory calculations suggest that CoMoS4 has a more favorable hydrogen adsorption free energy than Co(OH)F.
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