Busca avançada
Ano de início
Entree
(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Electrooxidation of ethanol on Pt and PtRu surfaces investigated by ATR surface-enhanced infrared absorption spectroscopy

Texto completo
Autor(es):
Silva, Marcio F. [1] ; Batista, Bruno C. [2] ; Boscheto, Emerson [2] ; Varela, Hamilton [2, 3] ; Camara, Giuseppe A. [1]
Número total de Autores: 5
Afiliação do(s) autor(es):
[1] Univ Fed Mato Grosso do Sul, Dept Quim, BR-79070900 Campo Grande, MS - Brazil
[2] Univ Sao Paulo, Inst Quim Sao Carlos, BR-13560970 Sao Carlos, SP - Brazil
[3] GIST, Ertl Ctr Electrochem & Catalysis, Kwangju 500712 - South Korea
Número total de Afiliações: 3
Tipo de documento: Artigo Científico
Fonte: Journal of the Brazilian Chemical Society; v. 23, n. 5, p. 831-837, MAY 2012.
Citações Web of Science: 7
Resumo

Herein, it was investigated for the first time the electro-oxidation of ethanol on Pt and PtRu electrodeposits in acidic media by using in situ surface enhanced infrared absorption spectroscopy with attenuated total reflection (ATR-SEIRAS). The experimental setup circumvents the weak absorbance signals related to adsorbed species, usually observed for rough, electrodeposited surfaces, and allows a full description of the CO coverage with the potential for both catalysts. The dynamics of adsorption-oxidation of CO was accessed by ATR-SEIRAS experiments (involving four ethanol concentrations) and correlated with expressions derived from a simple kinetic model. Kinetic analysis suggests that the growing of the CO adsorbed layer is nor influenced by the presence of Ru neither by the concentration of ethanol. The results suggest that the C-C scission is not related to the presence of Ru and probably happens at Pt sites. (AU)

Processo FAPESP: 09/07629-6 - Eletrocatálise IV: aspectos fundamentais e aplicados dos processos eletrocatalíticos, bio-eletrocatálise e instabilidades cinéticas
Beneficiário:Edson Antonio Ticianelli
Modalidade de apoio: Auxílio à Pesquisa - Programa BIOEN - Temático