Abstract
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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Acknowledgments
This work was supported by the National Natural Science Foundation of China (Grant Nos. 51073114, 20933007, 51073074, 50963002, and 2010GZH0041), Jiangxi Provincial Department of Education (GJJ11590, GJJ10678), the “One Hundred Talents” program of Chinese Academy of Sciences (1029471301), the Opening Project of Xinjiang Key Laboratory of Electronic Information Materials and Devices (XJYS0901-2010-01), and the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD).
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Jiang, F., Yao, Z., Yue, R. et al. Electrocatalytic activity of Pd nanoparticles supported on poly(3,4-ethylenedioxythiophene)-graphene hybrid for ethanol electrooxidation. J Solid State Electrochem 17, 1039–1047 (2013). https://doi.org/10.1007/s10008-012-1961-7
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DOI: https://doi.org/10.1007/s10008-012-1961-7