Lookup NU author(s): Professor Keith Scott,
Dr Wathiq Taama,
Dr Panagiotis Argyropoulos
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The performance of a liquid feed direct methanol fuel cell based on a Nafion® solid polymer electrolyte membrane is reported. The cell utilises a porous Pt-Ru-carbon supported catalyst anode. The effect of cell temperature, air cathode pressure, methanol fuel flow rate and methanol concentration on the power performance of a small-scale (9 cm2 area) cell is described. Data reported is analysed in terms of semi-empirical models for the effect of methanol crossover by diffusion on cathode potential and thus cell voltage. Mass transfer characteristics of the anode reaction are interpreted in terms of the influence of carbon dioxide gas evolution and methanol diffusion in the carbon cloth diffusion layer. Preliminary evaluation of reaction orders and anode polarisation agree with a previous suggested mechanism for methanol oxidation involving a rate limiting step of surface reaction between adsorbed CO and OH species. © 1999 Elsevier Science S.A. All rights reserved.
Author(s): Scott K, Taama WM, Argyropoulos P, Sundmacher K
Publication type: Article
Publication status: Published
Journal: Journal of Power Sources
Print publication date: 01/10/1999
ISSN (print): 0378-7753
ISSN (electronic): 1873-2755
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