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

Author(s)

Santoro, T. A. B. ; Oliveira Neto, A. ; Forbicini, C. A. L. G. de O. ; Linardi, M. ; Rodriguez, J. L. ; Pastor, E.

• Document type: Journal article
• Source: INTERNATIONAL JOURNAL OF ELECTROCHEMISTRY; v. 2012, p. 6-pg., 2012-01-01.

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). (AU)

• FAPESP's process: 03/03127-0 - Electrochemical studies on platinum-based electrocatalysts using alternative fuels in cells of the solid polymer electrolyte type
• Grantee: Almir Oliveira Neto
• Support Opportunities: Research Grants - Young Investigators Grants