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

Electro-oxidation of ethanol on ternary non-alloyed Pt-Sn-Pr/C catalysts

Full text
Author(s):
Corradini, Patricia G. [1] ; Antolini, Ermete [2] ; Perez, Joelma [1]
Total Authors: 3
Affiliation:
[1] Univ Sao Paulo, Inst Quim Sao Carlos, BR-13560970 Sao Carlos, SP - Brazil
[2] Scuola Sci Mat, I-16016 Genoa - Italy
Total Affiliations: 2
Document type: Journal article
Source: Journal of Power Sources; v. 275, p. 377-383, FEB 1 2015.
Web of Science Citations: 14
Abstract

Ternary Pt-Sn-Pr/C (70:10:20), (70:15:15) and (45:45:10) electro-catalysts were prepared by a modified formic acid method, and their activity for the ethanol oxidation reaction (EOR) was compared with that of Pt-Pr/C catalysts prepared by the same methods and that of commercial Pt-Sn/C (75:25) and Pt/C catalysts. Among all the catalysts, the Pt-Sn-Pr/C (45:45:10) catalyst presented both the highest mass activity and the highest specific activity. The steady state electrochemical stability of ternary Pt-Sn-Pr catalysts increased with the surface Sn/Pt atomic ratio. Following repetitive potential cycling (RPC), the activity for ethanol oxidation of Pt-Sn-Pr/C catalysts with high surface Sn/Pt atomic ratio was considerably higher than that of the corresponding as-prepared catalysts, and increased with increasing the Sn/Pt ratio. The increase of the EOR mass activity following RPC was ascribed to the increase of either the specific activity (for the Pt-Sn-Pr/C (70:15:15) catalyst) or the electrochemically active surface area (for the Pt-Sn-Pr/C (45:45:10) catalyst). Dissolution of Sn and Pr oxides from Pt-Sn-Pr/C catalyst surface was observed following RPC. (C) 2014 Elsevier B.V. All rights reserved, (AU)

FAPESP's process: 12/12189-8 - Investigation of platinum-rare earth nanocatalysts supported in carbon for direct ethanol fuel cells
Grantee:Patricia Gon Corradini
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 11/50727-9 - Development of systems for hydrogen production and for the generation and utilization of electrochemical energy
Grantee:Ernesto Rafael Gonzalez
Support type: Research Projects - Thematic Grants