PtSnCe/C and PtSnIr/C Electrocatalysts for Ethanol Oxidation: DEFC and in situ FTIR studies

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de Souza, R. F. B. ; Silva, J. C. M. ; Parreira, L. S. ; Silva, M. D-Villa ; Simoes, F. C. ; Calegaro, M. L. ; De Giz, M. J. ; Camara, G. A. ; Neto, A. O. ; Santos, M. C. ; Gasteiger, HA ; Weber, A ; Narayanan, SR ; Jones, D ; Strasser, P ; SwiderLyons, K ; Buchi, FN ; Shirvanian, P ; Nakagawa, H ; Uchida, H ; Mukerjee, S ; Schmidt, TJ ; Ramani, V ; Fuller, T ; Edmundson, M ; Lamy, C ; Mantz, R

• Document type: Journal article
• Source: POLYMER ELECTROLYTE FUEL CELLS 11; v. 41, n. 1, p. 6-pg., 2011-01-01.

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. (AU)

• FAPESP's process: 10/03037-4 - Degradation mechanism study of the cathode and anode catalyst for direct ethanol fuel cell
• Grantee: Fernando Carmona Simões
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 10/07831-7 - Synthesis and characterization of PtSn/C, PtIr/C and PtSnIr for the study of the mechanism of ethanol electrochemical oxidation using spectroscopic in situ techniques
• Grantee: Júlio César Martins da Silva
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 09/09145-6 - Study of ethanol electrochemical oxidation mechanism on PtSn, PtCe and PtSnCe using in-situ spectroscopic techniques
• Grantee: Rodrigo Fernando Brambilla de Souza
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 10/16511-6 - Energy generation from biofuel using nanostructures
• Grantee: Mauro Coelho dos Santos
• Support Opportunities: Regular Research Grants