Nanocomposite of MoS 2 on ordered mesoporous carbon nanospheres: A highly active catalyst for electrochemical hydrogen evolution

Xiaojun Bian, Jie Zhu, Lei Liao, Micheál D. Scanlon, Peiyu Ge, Chang Ji, Hubert H. Girault, Baohong Liu

Research output: Contribution to journalArticlepeer-review

Abstract

An efficient electrocatalyst for hydrogen evolution has been developed based upon in situ reduction of MoS 2 on ordered mesoporous carbon nanospheres (MoS 2/MCNs). The properties of MoS 2/MCNs were characterised by scanning electron microscopy, transmission electron microscopy and X-ray photoelectron spectroscopy. Polarisation curves and electrochemical impedance measurements were obtained for MoS 2/MCNs modified glassy carbon electrodes. The MoS 2/MCNs exhibit high catalytic activity for hydrogen evolution with a low overpotential 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 MoS 2 catalytic edge sites is presented.

Original languageEnglish
Pages (from-to)128-132
Number of pages5
JournalElectrochemistry Communications
Volume22
Issue number1
DOIs
Publication statusPublished - Aug 2012
Externally publishedYes

Keywords

  • Electrocatalyst
  • Hydrogen evolution reaction
  • Mesoporous carbon nanospheres
  • Molybdenum disulfide

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