Journal
ELECTROCHEMISTRY COMMUNICATIONS
Volume 22, Issue -, Pages 128-132Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2012.06.009
Keywords
Electrocatalyst; Hydrogen evolution reaction; Mesoporous carbon nanospheres; Molybdenum disulfide
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Funding
- NSFC [20925517, SKLEAC201101]
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An efficient electrocatalyst for hydrogen evolution has been developed based upon in situ reduction of MoS2 on ordered mesoporous carbon nanospheres (MoS2/MCNs). The properties of MoS2/MCNs were characterised by scanning electron microscopy, transmission electron microscopy and X-ray photoelectron spectroscopy. Polarisation curves and electrochemical impedance measurements were obtained for MoS2/MCNs modified glassy carbon electrodes. The MoS2/MCNs exhibit high catalytic activity for hydrogen evolution with a low over-potential and a very high current density. A theory outlining the origins of the Tafel slope for a Volmer-Heyrovsky (rate determining step) mechanism of hydrogen evolution at MoS2 catalytic edge sites is presented. (C) 2012 Elsevier B.V. All rights reserved.
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