Improved electrocatalytic oxygen reduction performance of platinum ternary alloy-oxide in solid-polymer-electrolyte fuel cells

The effect of base metal oxide (nonnoble metal oxide) in a Pt-Cr-Cu alloy catalyst is investigated for the oxygen reduction reaction in a solid-polymer-electrolyte fuel cell. The cathode mass activities at 0.9 V for Pt, Pt-Cr alloy, Pt-Cr-Cu alloy, and a mixture of Pt-Cr-Cu alloy with base metal oxi...

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Bibliographic Details
Published in:Journal of the Electrochemical Society 1994-04, Vol.141 (4), p.968-975
Main Authors: TAMIZHAMANI, G, CAPUANO, G. A
Format: Article
Language:English
Subjects:
30 DIRECT ENERGY CONVERSION
300505 - Fuel Cells- Electrochemistry, Mass Transfer & Thermodynamics
CATALYSTS
CATALYTIC EFFECTS
CHEMICAL REACTIONS
CHEMISTRY
CHROMIUM
COPPER
DIRECT ENERGY CONVERTERS
ELECTROCATALYSTS
ELECTROCHEMICAL CELLS
ELECTROCHEMISTRY
ELEMENTS
Exact sciences and technology
FUEL CELLS
General and physical chemistry
HYDROGEN FUEL CELLS
Kinetics and mechanism of reactions
METALS
PHYSICAL PROPERTIES
PLATINUM
PLATINUM METALS
REDOX REACTIONS
SOLID ELECTROLYTE FUEL CELLS
TRANSITION ELEMENTS
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Summary:The effect of base metal oxide (nonnoble metal oxide) in a Pt-Cr-Cu alloy catalyst is investigated for the oxygen reduction reaction in a solid-polymer-electrolyte fuel cell. The cathode mass activities at 0.9 V for Pt, Pt-Cr alloy, Pt-Cr-Cu alloy, and a mixture of Pt-Cr-Cu alloy with base metal oxide are compared. The enhancement factor is largest (about 6 times) for the mixture of Pt-Cr-Cu alloy with base metal oxide, compared to Pt-Cr and Pt-Cr-Cu alloys (about 2 times). The higher electrocatalytic activity of this material may be due to the combined effects of the Pt-Cr-Cu alloy and the base metal oxide. The physical and electrochemical characterizations are carried out using various techniques like X-ray diffraction, transmission electron microscopy, cyclic voltammetry, polarization, and ac impedance.
ISSN:0013-4651
1945-7111
DOI:10.1149/1.2054866