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Lookup NU author(s): Emeritus Professor Keith Scott,
Dr Hua Cheng
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Carbon-supported platinum-iron catalysts were fabricated and characterised by means of scanning electron microscopy, energy-dispersive X-ray system and X-ray diffraction. The catalysts were tested in electrochemical half cells for oxygen reduction using voltammetry and steady-state polarisation measurements and in direct methanol fuel cells. Use of PtFe/C cathodes, instead of a Pt/C cathode, partially suppressed methanol oxidation and led to higher net oxygen reduction currents in the presence of methanol. Consequently, an increase in power density up to 30% was achieved in direct methanol fuel cells with PtFe/C cathodes, compared to that with Pt/C cathode. The influence of alloy composition and operation conditions on the cell performance has been investigated.
Author(s): Scott K, Yuan W, Cheng H
Publication type: Article
Publication status: Published
Journal: Journal of Applied Electrochemistry
ISSN (print): 0021-891X
ISSN (electronic): 1572-8838
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