期刊
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
卷 17, 期 4, 页码 1039-1047出版社
SPRINGER
DOI: 10.1007/s10008-012-1961-7
关键词
Pd nanoparticles; Poly(3,4-ethylenedioxythiophene); Graphene; Catalytic activity; Ethanol electrooxidation
资金
- National Natural Science Foundation of China [51073114, 20933007, 51073074, 50963002, 2010GZH0041]
- Jiangxi Provincial Department of Education [GJJ11590, GJJ10678]
- One Hundred Talents program of Chinese Academy of Sciences [1029471301]
- Opening Project of Xinjiang Key Laboratory of Electronic Information Materials and Devices [XJYS0901-2010-01]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
The support materials play a critical role for the electrocatalytic oxidation of ethanol on precious metal catalysts in fuel cells. Here, we report the poly(3,4-ethylenedioxythiophene) combined with reduced graphene oxide (PEDOT-RGO) as the support of Pd nanoparticles (NPs) for ethanol electrooxidation in alkaline medium. The as-prepared Pd/PEDOT-RGO composite catalysts are characterized by Raman spectrometer, X-ray diffraction, transmission electron microcopy, and scanning electron microcopy. PEDOT-RGO composite with the porous structure facilitates the dispersion of Pd NPs with a smaller size leading to the increase of electrochemical active surface area. The electrochemical properties and electrocatalytic activities of Pd/PEDOT-RGO hybrid are evaluated by cyclic voltammetry, chronoamperometry, CO stripping voltammetry, electrochemical impedance spectroscopy (EIS) and Tafel analysis. The results suggest that Pd/PEDOT-RGO hybrid shows a higher electrocatalytic activity, a better long-term stability, and the poisoning tolerance for the ethanol electrooxidation than Pd on carbon black. EIS and Tafel analysis indicate that PEDOT-RGO improves the kinetics of ethanol electrooxidation on the Pd NPs and is an efficient support in fuel cells.
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