Preparation of PtSn/C electrocatalysts using citric acid as reducing agent for direct ethanol fuel cell (DEFC) |
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| Authors: | Almir Oliveira Neto R W R Verjulio-Silva M Linardi and E V Spinacé |
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| Institution: | 1.Instituto de Pesquisas Energéticas e Nucleares, IPEN–CNEN/SP,S?o Paulo,Brazil |
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| Abstract: | PtSn/C electrocatalysts (Pt:Sn atomic ratios of 50:50 and 60:40) were prepared using citric acid as reducing agent, and the
pH of the reaction medium was varied by the addition of OH− ions. The obtained electrocatalysts were characterized by energy dispersive X-ray analysis, X-ray diffraction, and transmission
electron microscopy. The electrocatalysts were tested on the direct ethanol fuel cell (DEFC) at 90 °C. The obtained PtSn/C
electrocatalysts showed the presence of a face-centered cubic, Pt, and SnO2 phases. In DEFC studies, the PtSn/C electrocatalysts showed a superior performance compared to a commercial PtSn/C and Pt/C
electrocatalysts from E-TEK. |
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