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Characterization and application of anion exchange polymer membranes with non-platinum group metals for fuel cells

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

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Abstract

An investigation of the carbon-supported iron phthalocyanine (Fe-Pc) catalyst for oxygen reduction reaction (ORR) in alkaline media and in hydrogen fuel cells is described. The non-noble metal Fe-Pc catalyst is shown to be a promising alternative to platinum for ORR in alkaline media, with onset potentials of ca. 15mV higher and double the mass activity than that of Pt. The catalyst also showed lower peroxide generation at lower voltages than Pt when tested at a rotating ring disc electrode. The effect of various parameters such as catalyst loading, catalyst layer thickness, fabrication technique, and ionomer on a hydrogen fuel cell performance using an alkaline electrolyte membrane made by radiation grafting is described. Peak power densities of the fuel cell with Pt/C oxygen reduction catalysts were greater than 100mW/cm at 60 degrees C using air. The performance of the fuel cell with the Fe-Pc catalyst was inferior to that with the Pt catalyst giving approximately half the peak power density initially due to the thicker catalyst layer and instability in the quaternary ammonium environment. However, the performance of the Fe-Pc catalyst under fuel cell conditions was found to fall with time due to an interaction of the catalyst with the ion-exchange group of the membrane and the ionomer used in the catalyst layer.

Publication metadata

Author(s): Mamlouk M, Wang X, Scott K, Horsfall JA, Williams C

Publication type: Article

Publication status: Published

Journal: Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy

Year: 2011

Volume: 225

Issue: A2

Pages: 152-160

Print publication date: 01/01/2011

ISSN (print): 0957-6509

ISSN (electronic): 2041-2967

Publisher: Sage Publications Ltd.

URL: http://dx.doi.org/10.1177/2041296710394264

DOI: 10.1177/2041296710394264

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