The selective oxidation of ethanol to CO2 at Pt-pc/Ir/Pt metallic multilayer nanostructured electrodes

Autor(es)

Freitas, Renato G. ^{[1, 2]} ; Pereira, Ernesto C. ^[2] ; Christensen, Paul A. ^[1]

Afiliação do(s) autor(es)

^[1] Newcastle Univ, Sch Chem Engn & Adv Mat, Newcastle Upon Tyne NE1 7RU, Tyne & Wear - England

^[2] Univ Fed Sao Carlos, Dept Quim, NANOFAEL, LIEC, BR-13565905 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Electrochemistry Communications; v. 13, n. 10, p. 1147-1150, OCT 2011.
• Citações Web of Science: 15

Resumo

In this work, Pt(pc)/Ir/Pt metallic multilayer nanostructured electrodes were prepared. The composition and number of the constituent metal layers were varied and the number of Ir and Pt layers studied were: 1.5:1.5, 1.5:10,10:1.5,10:10 and 250:250 Ir and Pt monolayers. The ethanol electrooxidation reaction and its products was studied using electrochemical in situ FUR technique and could be observed as a selective cleavage of the ethanol C-C bond in acidic electrolyte. Neither acetaldehyde nor acetic acid IR band could be observed for ethanol electrooxidation at 1.5 V vs. RHE over Pt(pc)/Ir(250)/Pt(250) metallic multilayer electrodes. Also, the enhancement on CO(2) production over this electrode was more than six times the amount observed using the Pt(pc) electrodes. Thus, the complete C-C cleavage bond in ethanol molecule was observed, leading only CO(2) as reaction product. (C) 2011 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 05/04708-1 - Preparacao e caracterizacao de multicamadas metalicas para eletrocatalise.
• Beneficiário: Renato Garcia de Freitas Sobrinho
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 10/05555-2 - Investigação da formação eletroquímica de nanotubos-TiO2 e sua aplicação em sistemas conversores de energia nanoarquiteturados
• Beneficiário: Renato Garcia de Freitas Sobrinho
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 03/09933-8 - Núcleo de Excelência em Materiais Nanoestruturados Fabricados Eletroquimicamente
• Beneficiário: Ernesto Chaves Pereira de Souza
• Modalidade de apoio: Auxílio à Pesquisa - Programa PRONEX - Temático