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Investigation of non-platinum cathode catalysts for direct borohydride fuel cells

Lookup NU author(s): Dr Hua Cheng, Emeritus Professor Keith Scott

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Abstract

Non-platinum electrocatalysts, i.e. iron tetramethoxyphenyl porphyrin (FeTMPP), silver and nickel, were evaluated regarding their ORR performances in alkaline media in half-cells and in alkaline electrolyte borohydride fuel cells. The FeTMPP cathode showed superior performances to those observed using the silver and nickel cathodes, e.g. a current density of -32.2 mA cm-2 at -0.8 V vs. Hg/HgO, an exchange current density of 7.3 × 10-8 mA cm-2 and power densities of up to 65.3 mW cm-2. The difference in performance can be attributed to variations in activity towards oxygen reduction reaction and in borohydride tolerance among the cathodes. The non-platinum cathodes were compared to a platinum cathode. © 2006 Elsevier B.V. All rights reserved.

Publication metadata

Author(s): Cheng H, Scott K

Publication type: Article

Publication status: Published

Journal: Journal of Electroanalytical Chemistry

Year: 2006

Volume: 596

Issue: 2

Pages: 117-123

ISSN (print): 0022-0728

ISSN (electronic): 1873-2569

Publisher: Elsevier SA

URL: http://dx.doi.org/10.1016/j.jelechem.2006.07.031

DOI: 10.1016/j.jelechem.2006.07.031

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