SOUZA, R.F.B. dePARREIRA, L.S.RASCIO, D.C.SILVA, J.C.M.TEIXEIRA NETO, E.CALEGARO, M.L.SPINACE, E.V.OLIVEIRA NETO, A.SANTOS, M.C.2014-07-312014-07-312014-07-312014-07-312010SOUZA, R.F.B. de; PARREIRA, L.S.; RASCIO, D.C.; SILVA, J.C.M.; TEIXEIRA NETO, E.; CALEGARO, M.L.; SPINACE, E.V.; OLIVEIRA NETO, A.; SANTOS, M.C. Study of ethanol electro-oxidation in acid environment on Pt3Sn/C anode catalysts prepared by a modified polymeric precursor method under controlled synthesis conditions. <b>Journal of Power Sources</b>, v. 195, n. 6, p. 1589-1593, 2010. DOI: <a href="https://dx.doi.org/10.1016/j.jpowsour.2009.09.065">10.1016/j.jpowsour.2009.09.065</a>. Disponível em: http://repositorio.ipen.br/handle/123456789/7799.0378-7753http://repositorio.ipen.br/handle/123456789/7799A carbon-supported binary Pt3Sn catalyst has been prepared using a modified polymeric precursor method under controlled synthesis conditions. This material was characterized using X-ray diffraction (XRD), and the results indicate that 23% (of a possible 25%) of Sn is alloyed with Pt, forming a dominant Pt3Sn phase. Transmission electron microscopy (TEM) shows good dispersion of the electrocatalyst and small particle sizes (3.6nm±1nm). The polarization curves for a direct ethanol fuel cell using Pt3Sn/C as the anode demonstrated improved performance compared to that of a PtSn/C E-TEK, especially in the intrinsic resistance-controlled and mass transfer regions. This behavior is probably associated with the Pt3Sn phase. The maximum power density for the Pt3Sn/C electrocatalyst (58mWcm−2) is nearly twice that of a PtSn/C E-TEK electrocatalyst (33mWcm−2). This behavior is attributed to the presence of a mixed Pt9Sn and Pt3Sn alloy phase in the commercial catalysts.1589-1593openAccessethanol fuelsoxidationelectrocatalystsacetic acidplatinumalloystin alloysnanostructurespolymersprecursorfuel cellsArtigo de periódico619510.1016/j.jpowsour.2009.09.065https://orcid.org/0000-0002-9287-6071https://orcid.org/0000-0002-7011-8261