Preparation of PtRu/C Electrocatalysts Using Citric Acid as Reducing Agent and OH- ions as Stabilizing Agent for Direct Alcohol Fuel Cell (DAFC)

Autor(es)

Neto, A. O. ^[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: International Journal of Electrochemical Science; v. 4, n. 7, p. 954-961, JUL 2009.
• Citações Web of Science: 40

Resumo

PtRu/C electrocatalysts (Pt: Ru atomic ratio of 50: 50 and 80: 20) were prepared using citric acid as reducing agent and OH(-) ions as stabilizing agent. The obtained electrocatalysts were characterized by energy dispersive X-ray analysis and transmission electron microscopy. The electro-oxidation of methanol and ethanol were studied at room temperature by chronoamperometry. Studies on the Direct Methanol Fuel Cell (DMFC) and Direct Ethanol Fuel Cell (DEFC) were carried at 90 degrees C. For both electrocatalysts the obtained Pt: Ru atomic ratios were similar to the nominal ones and the average particles sizes were around 2.5 nm. The chronoamperometry and DAFC experiments showed that the electrocatalyst prepared with Pt: Ru atomic ratio of 80:20 has a superior performance for methanol oxidation, while the electrocatalyst prepared with Pt: Ru atomic ratio of 50:50 has a superior performance for ethanol oxidation. (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