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Lookup NU author(s): Dr Mohamed Mamlouk,
Emeritus Professor Keith Scott
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A study of a phosphoric acid doped polybenzimidazole (PBI) membrane fuel cell using commercial carbon supported, Pt alloy oxygen reduction catalysts is reported. The cathodes were made from PTFE bonded carbon supported Pt alloys without PBI but with phopshoric acid added to the electrode for ionic conductivity. Polarisation data for fuel cells with cathodes made with alloys of Pt with Ni, Co, Ru and Fe are compared with those with Pt alone as cathode at temperatures between 120 and 175 °C. With the same loading of Pt enhancement in cell performance was achieved with all alloys except Pt-Ru, in the low current density activation kinetics region of operation. The extent of enhancement depended upon the operating temperature and also the catalyst loading. In particular a Pt-Co alloy produced performance significantly better than Pt alone, e.g. a peak power, with low pressure air, of 0.25 W cm -2 with 0.2 mg Pt cm-2 of a 20 wt% Pt-Co catalyst. © 2010 Elsevier B.V. All rights reserved.
Author(s): Scott K; Mamlouk M
Publication type: Article
Publication status: Published
Journal: Journal of Power Sources
Print publication date: 17/08/2010
ISSN (print): 0378-7753
ISSN (electronic): 1873-2755
Publisher: Elsevier SA
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