PtRu/C and PtRuBi/C Electrocatalysts Prepared in Two Different Ways by Borohydride Reduction for Ethanol Electro-Oxidation

Autor(es)

Brandalise, Michele ^[1] ; Tusi, Marcelo Marques ^[1] ; Piasentin, Ricardo Marcelo ^[1] ; Linardi, Marcelo ^[1] ; Spinace, Estevam Vitorio ^[1] ; Oliveira Neto, Almir ^[1]

Afiliação do(s) autor(es)

^[1] CNEN SP, IPEN, BR-05508900 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: International Journal of Electrochemical Science; v. 5, n. 1, p. 39-45, JAN 2010.
• Citações Web of Science: 16

Resumo

PtRu/C (50:50) and PtRuBi/C (50:40:10) electrocatalysts were prepared by borohydride reduction using H(2)PtCl(6)center dot 6H(2)O, RuCl(3)center dot xH(2)O and Bi(NO(3))(3)center dot 5H(2)O as metals sources and Vulcan XC72 as support. The borohydride solution was added in two different ways: drop by drop and rapid addition of all the solution. The obtained electrocatalysts were characterized by EDX, XRD and cyclic voltammetry. The electro-oxidation of ethanol was studied by cyclic voltammetry and chronoamperometry at room temperature and on a single cell of a direct ethanol fuel cell (DEFC) at 100 degrees C. PtRuBi/C electrocatalysts showed superior performance for ethanol electro-oxidation than PtRu/C electrocatalysts prepared in a similar way. However, PtRuBi/C electrocatalyst prepared by rapid addition of the borohydride solution showed superior performance for ethanol electro-oxidation at room temperature, while PtRuBi/C electrocatalyst prepared by addition drop by drop of borohydride solution showed superior performance on DEFC at 100 degrees C. (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