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An investigation of Pt alloy oxygen reduction catalysts in phosphoric acid doped PBI fuel cells

Lookup NU author(s): Professor Mohamed MamloukORCiD, Emeritus Professor Keith Scott

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Abstract

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.

Publication metadata

Author(s): Scott K; Mamlouk M

Publication type: Article

Publication status: Published

Journal: Journal of Power Sources

Year: 2011

Volume: 196

Issue: 3

Pages: 1084-1089

Print publication date: 17/08/2010

ISSN (print): 0378-7753

ISSN (electronic): 1873-2755

Publisher: Elsevier SA

URL: http://dx.doi.org/10.1016/j.jpowsour.2010.08.021

DOI: 10.1016/j.jpowsour.2010.08.021

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