Abstract
Carbon supported Pt-Pd (Pt-Pd/C) catalysts with different Pt/Pd ratios were prepared by microwave assisted ethylene glycol method and characterized by X-ray diffraction (XRD), transmission electron spectroscopy (TEM) and electrochemical measurements. The results reveal that the metal nanoparticles of Pt-Pd/C catalysts are uniformly dispersed on the carbon support and exist as alloys with face centered cubic (FCC) structures. The effects of both preparation process and Pt/Pd ratios on the structure and catalytic activity of the Pt-Pd/C catalysts were investigated. With the increase of Pd content, the catalytic activity for ORR is deteriorated due to the increased metal particle size of Pt-Pd/C catalysts, while improving the methanol tolerance. Among the Pt-Pd/C catalysts with different Pt/Pd ratios, the Pt3Pd/C catalyst, which have the highest Pt/Pd ratios, exhibits higher specific mass activities toward oxygen reduction reaction (ORR) than that of the commercial Pt/C catalyst.
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Published in Russian in Elektrokhimiya, 2015, Vol. 51, No. 4, pp. 399–407.
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Tang, Y., Gao, F., Mu, S. et al. Investigation of oxygen reduction reaction and methanol tolerance on the carbon supported Pt-Pd catalysts. Russ J Electrochem 51, 345–352 (2015). https://doi.org/10.1134/S1023193515040126
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DOI: https://doi.org/10.1134/S1023193515040126