Electro-oxidation of ethanol using PtSnRh/C electrocatalysts prepared by an alcohol-reduction process

Autor(es)

Spinace, E. V. ^[1] ; Dias, Ricardo R. ^[1] ; Brandalise, Michele ^[1] ; Linardi, Marcelo ^[1] ; Oliveira Neto, Almir ^[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. 91-95, FEB 2010.
• Citações Web of Science: 43

Resumo

PtRh/C (90:10), PtRh/C (50:50), PtSn/C (50:50), and PtSnRh/C (50:40:10) electrocatalysts were prepared by an alcohol-reduction process using ethylene glycol as solvent and reduction agent and Vulcan Carbon XC72 as supports. The electrocatalysts were characterized by energy-dispersive X-ray analysis, X-ray diffraction, and transmission electron microscopy. The electro-oxidation of ethanol was studied by cyclic voltammetry chronoamperometry at room temperature and on a single cell of a direct ethanol fuel cell at 100 A degrees C. Cyclic voltammetry and chronoamperometry experiments showed that PtSnRh/C and PtSn/C electrocatalysts have similar performance for ethanol oxidation at room temperature, while the activity of PtRh/C electrocatalysts was very low. At 100 A degrees C on a single cell, PtSnRh/C showed superior performance compared to PtSn/C and PtRh/C electrocatalysts. (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