Journal
ELECTROCHIMICA ACTA
Volume 51, Issue 8-9, Pages 1622-1628Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2005.02.108
Keywords
electrochemical impedance spectroscopy; polymer electrolyte fuel cells; hydrogen oxidation reaction; state-space model; pseudo reference electrode
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The nature of the solid electrolyte and the low electrode-electrode gap in polymer electrolyte fuel cells (PEFCs) makes it difficult to introduce a reference electrode into the fuel cell in order to separate anodic and cathodic overpotential contributions. A suitable experimental setup should not disturb the current distribution in the fuel cell. In order to satisfy the boundary conditions, we introduced a pseudo reference electrode into the fuel cell. With this setup, we have measured the impedance of both electrodes separately with respect to the pseudo reference electrode at different current densities. A state-space model was used to study the hydrogen oxidation reaction in order to identify kinetic parameters. (c) 2005 Elsevier Ltd. All rights reserved.
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