Journal
CATALYSIS TODAY
Volume 82, Issue 1-4, Pages 195-206Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0920-5861(03)00233-5
Keywords
proton exchange membrane; fuel cell; reactor; impedance spectroscopy; mass-transfer
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Proton exchange membrane fuel cells (PEMFC) are considered as electrochemical reactors, performances of which are regarded in the context of the various effects influencing FC output, such as mass transports, kinetic of electrode reactions and charge transfer in polymer electrolyte membrane (PEM). An experimental approach, involving the employment of impedance spectroscopy (IS), which allows a deep insight into the nature of these effects, is discussed and its applications to the different aspects of PEMFC functioning are reported. As examples of the use of IS in PEMFC studies, the investigations of the membrane conductivity and in situ studies of the anode and the cathode processes during FC operation are presented. (C) 2003 Elsevier B.V. All rights reserved.
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