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International Journal of Electrochemistry
Volume 2012, Article ID 674150, 6 pages
http://dx.doi.org/10.1155/2012/674150
Research Article

Ethanol Electrooxidation on Pt with Lanthanum Oxide as Cocatalyst in a DAFC

1Departamento de Química Física, Instituto Universitario de Materiales y Nanotecnología, Universidad de La Laguna, C/Astrofísico Francisco Sánchez s/n, 38071 La Laguna, Spain
2Instituto de Pesquisas Energéticas e Nucleares (IPEN), CNEN-SP, Avenida Professor Lineu Prestes 2242, Cidade Universitária, 05508-900 São Paulo, SP, Brazil

Received 1 May 2011; Revised 1 November 2011; Accepted 24 November 2011

Academic Editor: Newton Pimenta Neves Jr.

Copyright © 2012 T. A. B. Santoro et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Electrocatalytic activity toward ethanol electrooxidation of Pt particles in PtLa/C catalysts with different Pt : La ratios has been studied with different electrochemical and spectroscopic techniques, and the results were compared to those of Pt/C catalyst. Significant enhancement in the electrocatalytic activity has been achieved by depositing the Pt particles with lanthanum oxides/hydroxides using an alcohol reduction method. Compared to Pt/C catalyst, PtLa/C materials exhibit a lower onset potential and a higher electron-transfer rate constant for the investigated reaction. These studies illustrate the possibility of utilizing Pt/C with La oxides/hidroxides as electrocatalyst for direct alcohol fuel cells (DAFCs).