Journal
NANO RESEARCH
Volume 11, Issue 4, Pages 2024-2033Publisher
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-017-1818-6
Keywords
CoMoS4 nanosheet array; hydrogen evolution reaction; anion exchange reaction; neutral pH; density functional theory
Categories
Funding
- National Key Scientific Instrument and Equipment Development Project of China [21627809]
- National Natural Science Foundation of China [21375047, 21377046, 21405059, 21575137, 21575050, 21601064]
- Natural Science Foundation of Shandong Province [ZR2016JL013, ZR2016BQ10]
- Graduate Innovation Foundation of University of Jinan [YCXB15004]
- Special Foundation for Taishan Scholar Professorship of Shandong Province [ts20130937]
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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)(2)MoS4 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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