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(Reference retrieved automatically from Google Scholar through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Pt-Sn/C electrocatalysts for methanol oxidation synthesized by reduction with formic acid

Full text
Author(s):
Colmati‚ F. ; Antolini‚ E. ; Gonzalez‚ E.R.
Total Authors: 3
Document type: Journal article
Source: Electrochimica Acta; v. 50, n. 28, p. 5496-5503, 2005.
Abstract

Carbon supported Pt-Sn alloy catalysts were prepared by reduction of Pt and Sn precursors with formic acid, and their electrocatalytic activity for methanol oxidation was compared with commercial Pt/C and Pt75Sn25/C electrocatalysts. By X-ray diffraction analysis it was found that the Pt lattice parameter increases with the addition of Sn, indicative of alloy formation. It was confirmed that Sn exhibits cocatalytic activity for CO oxidation. The onset potential for the methanol oxidation reaction of the Pt-Sn electrode was approximately 0.1 V smaller than that on Pt both at room temperature and at 90 degrees C. The best performance in a direct methanol fuel cell was obtained using the Pt75Sn25/C alloy catalyst prepared by the formic acid method as the result of an optimal balance of Sn content, degree of alloying and metal particle size. (C) 2005 Elsevier Ltd. All rights reserved. (AU)

FAPESP's process: 99/06430-8 - Electrocatalysis part III: Kinetics and mechanism of electrochemical processes in energy conversion and storage
Grantee:Ernesto Rafael Gonzalez
Support Opportunities: Research Projects - Thematic Grants