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

Author(s)

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

Affiliation

^[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

• Document type: Journal article
• Source: Electrochemistry Communications; v. 13, n. 10, p. 1147-1150, OCT 2011.
• Web of Science Citations: 15

Abstract

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)

• FAPESP's process: 10/05555-2 - Electrochemical investigation of TiO2-nanotubes formation and its application on energy convertion nanostructured systems
• Grantee: Renato Garcia de Freitas Sobrinho
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 03/09933-8 - Center for Excellence in Electrochemically Synthesized Nanostructures
• Grantee: Ernesto Chaves Pereira de Souza
• Support Opportunities: PRONEX Research - Thematic Grants