Preparation of PtSn/C electrocatalysts using citric acid as reducing agent for direct ethanol fuel cell (DEFC)

Autor(es)

Oliveira Neto, Almir ^[1] ; Verjulio-Silva, R. W. R. ^[1] ; Linardi, M. ^[1] ; Spinace, E. V. ^[1]

Afiliação do(s) autor(es)

^[1] IPEN CNEN SP, BR-05508000 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: IONICS; v. 16, n. 1, p. 85-89, FEB 2010.
• Citações Web of Science: 9

Resumo

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 A degrees C. The obtained PtSn/C electrocatalysts showed the presence of a face-centered cubic, Pt, and SnO(2) 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. (AU)

• Processo FAPESP: 07/07898-1 - Preparação e caracterização de sistemas PtRu/C + Terras Raras e PtSn/C + Terras Raras para emprego em células a combustível do tipo eletrólito polimérico sólido alimentadas diretamente por etanol
• Beneficiário: Almir Oliveira Neto
• Modalidade de apoio: Auxílio à Pesquisa - Regular