TY - JOUR
T1 - Nanocomposite of MoS 2 on ordered mesoporous carbon nanospheres
T2 - A highly active catalyst for electrochemical hydrogen evolution
AU - Bian, Xiaojun
AU - Zhu, Jie
AU - Liao, Lei
AU - Scanlon, Micheál D.
AU - Ge, Peiyu
AU - Ji, Chang
AU - Girault, Hubert H.
AU - Liu, Baohong
PY - 2012/8
Y1 - 2012/8
N2 - 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.
AB - 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.
KW - Electrocatalyst
KW - Hydrogen evolution reaction
KW - Mesoporous carbon nanospheres
KW - Molybdenum disulfide
UR - http://www.scopus.com/inward/record.url?scp=84864244389&partnerID=8YFLogxK
U2 - 10.1016/j.elecom.2012.06.009
DO - 10.1016/j.elecom.2012.06.009
M3 - Article
AN - SCOPUS:84864244389
SN - 1388-2481
VL - 22
SP - 128
EP - 132
JO - Electrochemistry Communications
JF - Electrochemistry Communications
IS - 1
ER -