期刊
CHEMCATCHEM
卷 6, 期 7, 页码 2059-2064出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cctc.201402000
关键词
electrocatalysts; hydrogen evolution; molybdenum carbide; nickel; water splitting
资金
- National Natural Science Foundation of China [21173250]
- Chinese Academy of Sciences Solar Energy Plan Project [KGCX2.EW.311]
The integration of commercial photovoltaic devices and electrocatalysts has attracted considerable interest to realize the conversion of solar power to renewable hydrogen energy. However, a noble metal electrocatalyst (Pt) is too expensive and rare, which inspires the development of efficient and economical catalytic electrodes. Herein, we have fabricated a 3D MoxC/Ni network through the carbonization of a polyaniline-Mo7O24 precursor, which was electrochemically deposited on Ni foam in advance. If the 3D MoxC/Ni network is used as a catalytic electrode for the hydrogen evolution reaction (HER), a low onset potential of approximately 44 mV for driving 1 mA cm(-2) of current density and a Tafel slope of approximately 49 mV decade(-1) (overpotential eta = 50-60 mV) are obtained. Moreover, the apparent exchange current density reaches approximately 0.1 mA cm(-2). After a long-term HER test at eta = 100 mV or 500 CV sweeps, no deactivation is observed. This excellent electrocatalytic performance of the 3D MoxC/Ni network promotes it as a promising earth-abundant HER electrode.
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