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

Lookup NU author(s): Professor Paul Christensen

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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 CO2 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 CO2 as reaction product. (C) 2011 Elsevier B.V. All rights reserved.


Publication metadata

Author(s): Freitas RG, Pereira EC, Christensen PA

Publication type: Article

Publication status: Published

Journal: Electrochemistry Communications

Year: 2011

Volume: 13

Issue: 10

Pages: 1147-1150

Print publication date: 04/08/2011

ISSN (print): 1388-2481

ISSN (electronic): 1873-1902

Publisher: Elsevier Inc.

URL: http://dx.doi.org/10.1016/j.elecom.2011.07.025

DOI: 10.1016/j.elecom.2011.07.025


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Funding

Funder referenceFunder name
Brazilian Research Funding Institution CAPES
Brazilian Research Funding Institution CNPq
03/09933-8Brazilian Research Funding Institution FAPESP
05/04708-1Brazilian Research Funding Institution FAPESP
2010/05555-2Brazilian Research Funding Institution FAPESP

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