Mesoporous Pt electrocatalyst for methanol tolerant cathodes of DMFC

High activity mesoporous Pt electrocatalyst, having 2D-hexagonal mesostructure, was synthesized using a triblock poly(ethylene oxide)-b–poly(propylene oxide)-b–poly(ethylene oxide) copolymer (Pluronic F127®) template. The catalyst was characterized for the oxygen reduction reaction (ORR) in a rotati...

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Bibliographic Details
Published in:Electrochimica acta 2012-06, Vol.71, p.173-180
Main Authors: Franceschini, Esteban A., Bruno, Mariano M., Viva, Federico A., Williams, Federico J., Jobbágy, Matías, Corti, Horacio R.
Format: Article
Language:English
Subjects:
Applied sciences
Catalysts
Cathodes
Conversion
Electrocatalysts
Electrodes
Electroreduction
Energy
Energy. Thermal use of fuels
Equipments for energy generation and conversion: thermal, electrical, mechanical energy, etc
Exact sciences and technology
Fuel cells
Mesoporous Pt
Methanol
Methyl alcohol
Oxygen
Platinum
Tafel slopes
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Summary:High activity mesoporous Pt electrocatalyst, having 2D-hexagonal mesostructure, was synthesized using a triblock poly(ethylene oxide)-b–poly(propylene oxide)-b–poly(ethylene oxide) copolymer (Pluronic F127®) template. The catalyst was characterized for the oxygen reduction reaction (ORR) in a rotating ring disk electrode (RRDE) configuration, obtaining a high efficiency of conversion to H2O. The formation of H2O2 during the ORR was low and a change in Tafel slope analysis indicated a change in the reaction mechanism with temperature. It was found, through differential electrochemical mass spectrometry (DEMS) analysis, that the mesoporous Pt catalysts exhibit a high methanol to CO2 conversion efficiency and high tolerance to CO poisoning. The procedure described in this work for preparing mesoporous Pt catalyst by electrodeposition provides a simple method for the generation of high-performance cathodes for direct methanol PEM fuel cells.
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2012.03.121