期刊
ELECTROCHIMICA ACTA
卷 108, 期 -, 页码 644-650出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2013.07.022
关键词
Molybdenum carbide; Palladium electrocatalyst; Ethanol oxidation; Synergistic effect; Electrocatalytic stability
资金
- China Postdoctoral Science Foundation [2012M521011]
- College Natural Science Research Program of Jiangsu Province [12KJB150007]
- Research Foundation for Talented Scholars of Jiangsu University [11JDG142]
- Science and Technology Support Program of Jiangsu [BE2010144]
- Natural Science Foundation of Jiangsu [BK2010166]
- Social Development Program of Zhenjiang [SH2010025]
- Social Development Foundation of Zhenjiang [SH2011005]
Molybdenum carbide (MoC) with the diameter of 2-4 nm on carbonized resin (C-MoC) is synthesized through ionic exchange process. Pd particles are loaded on the C-MoC as electrocatalyst (Pd/C-MoC) for ethanol oxidation in alkaline media. The above materials are characterized by XRD, TEM, EDS and cyclic voltammogram measurements. There are three excellent effects of MoC nanoparticles on Pd electrocatalyst by comparing with that of Pd loading on Vulcan XC-72 carbon (Pd/C). Firstly, MoC benefits the formation of smaller Pd particles. Secondly, 3.0 times higher peak current density (3722 mA mg(Pd)(-1)) and 130 mV more negative onset potential are obtained for ethanol oxidation, indicating synergistic effect between MoC and Pd. Thirdly, higher electrocatalytic stability is found. The novel multi-effects of MoC on Pd make Pd/C-MoC a highly active, highly stable and low-cost fuel cell electrocatalyst candidate. (C) 2013 Elsevier Ltd. All rights reserved.
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