Carbon monoxide and methanol oxidations on carbon nanofibers supported Pt–Ru electrodes at different temperatures

•CO and methanol oxidations on Pt–Ru supported on carbon nanofibers were studied.•CO and methanol activation energies were determined up to 70°C.•Ru strongly decreases the activation energy for the CO oxidation reaction.•The rate-determining step for the methanol oxidation changes at T≥50°C.•Catalys...

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Bibliographic Details
Published in:Electrochimica acta 2015-12, Vol.186, p.359-368
Main Authors: Calderón, J.C., García, G., Querejeta, A., Alcaide, F., Calvillo, L., Lázaro, M.J., Rodríguez, J.L., Pastor, E.
Format: Article
Language:English
Subjects:
carbon nanofibers
catalyst support
direct methanol fuel cell
methanol electrooxidation
PtRu electrocatalysts
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Summary:•CO and methanol oxidations on Pt–Ru supported on carbon nanofibers were studied.•CO and methanol activation energies were determined up to 70°C.•Ru strongly decreases the activation energy for the CO oxidation reaction.•The rate-determining step for the methanol oxidation changes at T≥50°C.•Catalysts performance in DMFC is enhanced by the carbon nanofibers support. The current work focuses on the mechanistic and kinetic study of CO and methanol oxidation reactions in acidic medium for Pt–Ru nanoparticles (atomic ratio 1:1) supported on carbon nanofibers (CNFs) in an intermediate temperature range (20
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2015.09.121