Study of ethanol electro-oxidation in acid environment on Pt3Sn/C anode catalysts prepared by a modified polymeric precursor method under controlled synthesis conditions

Autor(es)

De Souza, R. F. B. ^[1] ; Parreira, L. S. ^[1] ; Rascio, D. C. ^[1] ; Silva, J. C. M. ^[1] ; Teixeira-Neto, E. ^[1] ; Calegaro, M. L. ^[2] ; Spinace, E. V. ^[3] ; Neto, A. O. ^[3] ; Santos, M. C. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed ABC, LEMN, CCNH, BR-09210170 Santo Andre, SP - Brazil

^[2] Univ Sao Paulo, Grp Mat Eletroquim & Metodos Eletroanalit, Inst Quim Sao Carlos, BR-13566590 Sao Carlos, SP - Brazil

^[3] IPEN CNEN SP, BR-05508900 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Power Sources; v. 195, n. 6, SI, p. 1589-1593, MAR 15 2010.
• Citações Web of Science: 62

Resumo

A 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 election microscopy (TEM) shows good dispersion of the electrocatalyst and small particle sizes (3 6 nm +/- 1 nm) 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 (58 mW cm(-2)) is nearly twice that of a PtSn/C E-TEK electrocatalyst (33 mW cm(-2)) This behavior is attributed to the presence of a mixed Pt9Sn and Pt3Sn alloy phase in the commercial catalysts (C) 2009 Elsevier B V All rights reserved (AU)

• Processo FAPESP: 08/58789-0 - Eletrocatalise da reacao de reducao de oxigenio utilizando-se catalisadores binarios baseados em pt
• Beneficiário: Daniel Campana Rascio
• Linha de fomento: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 05/59992-6 - Materiais nanoestruturados: eletrocatálise e membranas de óxidos
• Beneficiário: Mauro Coelho dos Santos
• Linha de fomento: Auxílio à Pesquisa - Apoio a Jovens Pesquisadores
• Processo FAPESP: 08/58788-4 - Eletrocatalise das reacoes de oxidacao de metanol e etanol utilizando-se nanomateriais baseados em ligas metalicas de ptsn
• Beneficiário: Luanna Silveira Parreira
• Linha de fomento: Bolsas no Brasil - Iniciação Científica