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Pt–Ru electrocatalysts supported on ordered mesoporous carbon for direct methanol fuel cell

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Title: Pt–Ru electrocatalysts supported on ordered mesoporous carbon for direct methanol fuel cell
Authors: Salgado, J.R.C.1, Alcaide, F.2, Álvarez, G.2, Calvillo, L.3, Lázaro, M.J.3, Pastor, E.1 epastor@ull.es
Source: Journal of Power Sources. Jul2010, Vol. 195 Issue 13, p4022-4029. 8p.
Subjects: Metal catalysts, Mesoporous materials, Carbon, Fuel cells, Methanol as fuel, X-ray spectroscopy, X-ray diffraction, Electrochemistry
Abstract: Abstract: Pt–Ru electrocatalysts supported on ordered mesoporous carbon (CMK-3) were prepared by the formic acid method. Catalysts were characterized applying energy dispersive X-ray analyses (EDX) and X-ray diffraction (XRD). Methanol and carbon monoxide oxidation was studied electrochemically by cyclic voltammetry, and current–time curves were recorded in a methanol solution in order to establish the activity towards this reaction under potentiostatic conditions. The physicochemical and electrochemical properties of the Pt–Ru catalysts supported on CMK-3 carbon were compared with those of electrocatalysts supported on Vulcan XC-72 and commercial catalyst from E-TEK. Additionally, in order to complete this study, Pt electrocatalysts supported on CMK-3 and Vulcan XC-72 were prepared by the same method and were used as reference. Results showed that the Pt–Ru/CMK-3 catalyst presented the best electrocatalytic activity towards the CO oxidation and, therefore, good perspectives to its application in DMFC anodes. On the other hand, the activity of the Pt–Ru/CMK-3 catalyst towards methanol oxidation was higher than that of the commercial Pt–Ru/C (E-TEK) catalyst on all examined potentials, confirming the potential of the bimetallic catalysts supported on mesoporous carbons. [Copyright &y& Elsevier]
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Database: Engineering Source
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Abstract:Abstract: Pt–Ru electrocatalysts supported on ordered mesoporous carbon (CMK-3) were prepared by the formic acid method. Catalysts were characterized applying energy dispersive X-ray analyses (EDX) and X-ray diffraction (XRD). Methanol and carbon monoxide oxidation was studied electrochemically by cyclic voltammetry, and current–time curves were recorded in a methanol solution in order to establish the activity towards this reaction under potentiostatic conditions. The physicochemical and electrochemical properties of the Pt–Ru catalysts supported on CMK-3 carbon were compared with those of electrocatalysts supported on Vulcan XC-72 and commercial catalyst from E-TEK. Additionally, in order to complete this study, Pt electrocatalysts supported on CMK-3 and Vulcan XC-72 were prepared by the same method and were used as reference. Results showed that the Pt–Ru/CMK-3 catalyst presented the best electrocatalytic activity towards the CO oxidation and, therefore, good perspectives to its application in DMFC anodes. On the other hand, the activity of the Pt–Ru/CMK-3 catalyst towards methanol oxidation was higher than that of the commercial Pt–Ru/C (E-TEK) catalyst on all examined potentials, confirming the potential of the bimetallic catalysts supported on mesoporous carbons. [Copyright &y& Elsevier]
ISSN:03787753
DOI:10.1016/j.jpowsour.2010.01.001