Published in
The Electrochemical Society, ECS Transactions, 1(41), p. 1293-1298, 2011
DOI: 10.1149/1.3635660
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PtSnCe/C and PtSnIr/C Electrocatalysts for Ethanol Oxidation: DEFC and In Situ FTIR studies
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Júlio César M. Da Silva,
Júlio César M. Da Silva,
Luanna S. Parreira,
Melina D́Villa-Silva,
Fernando Carmona Simões,
Marcelo Luiz Calegaro,
Martha Janete De Giz,
Giuseppe Abíola Ca^mara,
Giuseppe Abíola Câmara,
Almir Oliveira Neto,
Mauro C. Santos
Full text: Unavailable
Abstract
In the present work, we investigated PtSnCe/C (68:22:10), PtSnIr/C (33:33:33) and commercial PtSn/C (E-Tek) electrocatalysts as anodes in a DEFC. The effects of decreasing the Pt content in the electrocatalysts were also investigated. The product distributions resulting from the ethanol oxidation reaction (EOR) in acid solutions using PtSnCe/C, PtSnIr/C and the commercial PtSn/C materials as electrocatalysts were determined by in situ FTIR spectroscopy. All of the anodes contained 20% (w/w) metal on carbon. From in situ FTIR experiments using 2.0 mol L-1 ethanol, it was observed that the PtSnCe/C and PtSnIr/C materials led to the formation of acetic acid as the predominant oxidation product. The best results for the EOR were obtained with the PtSnCe/C material. However, it was observed that the PtSnIr/C electrocatalyst material tolerated a decrease in Pt content while still showing good performance.