Abstract
Carbon supported Pt-Sn alloy catalysts were prepared by reduction of Pt and Sn precursors with formic acid and characterised by X-ray diffraction, high resolution transmission electron microscopy and X-ray absorption near-edge structure analyses. The electrocatalytic activity for ethanol oxidation was compared with that of a commercial Pt3Sn/C electrocatalysts from E-TEK. The synthetized Pt3Sn catalysts presents a lower degree of alloy that increases when the catalysts is submitted to a thermal treatment. The prepared Pt3Sn catalyst, submitted to a thermal treatment, showed a better performance as anode material in a direct ethanol fuel cell (DEFC) operating at 90 oC.
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