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Evaluation of carbon-supported ruthenium-selenium-tungsten catalysts for direct methanol fuel cells

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

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Abstract

The use of ruthenium-selenium-tungsten catalysts as methanol tolerant cathodes for direct methanol fuel cells is reported. The novel catalysts were produced by decarbonylation of ruthenium and tungsten carbonyls in the presence of selenium and carbon powders. The produced materials were characterised in both half cells and fuel cells. The addition of tungsten led to better oxygen reduction performance, giving current densities up to 30% greater and cell power densities up to 25% greater than those obtained with ruthenium-selenium alone. There is only a minor loss in methanol tolerance in the presence of tungsten. The improvement in performance is a consequence of the beneficial influence of tungsten on the structure and properties of catalysts. The effects of fuel cell operating conditions are also reported. The new catalysts were compared to Pt. © 2007 Elsevier B.V. All rights reserved.

Publication metadata

Author(s): Cheng H, Yuan W, Scott K, Browning DJ, Lakeman JB

Publication type: Article

Publication status: Published

Journal: Journal of Power Sources

Year: 2007

Volume: 172

Issue: 2

Pages: 597-603

ISSN (print): 0378-7753

ISSN (electronic): 1873-2755

Publisher: Elsevier SA

URL: http://dx.doi.org/10.1016/j.jpowsour.2007.05.038

DOI: 10.1016/j.jpowsour.2007.05.038

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