Journal
ELECTROCHIMICA ACTA
Volume 56, Issue 3, Pages 1164-1171Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2010.10.026
Keywords
Catalyst-coated membrane; Pt-Pd/C electrocatalyst; PEM fuel cells; Carbon support; Oxygen-reduction reaction
Categories
Funding
- Center for Petroleum, Petrochemicals and Advanced Materials, Chulalongkorn University
- National Metal and Materials Technology Center (MTEC) [MT-B-52-END-09-069-G]
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The influence of the electrocatalyst loading (2.0-40.7 wt.%) on a carbon support on its suitability as a cathode for proton-exchange membrane (PEM) fuel cells was evaluated at a constant membrane electrocatalyst loading of 0.15 mg/cm(2). The results clearly demonstrate that different electrocatalyst loadings on a carbon support in the investigated range significantly affect not only the electrocatalyst activity but also the performance in H-2/O-2 fuel cells. Increasing the electrocatalyst loading on a carbon support led to an increase in the particle size of electrocatalyst and the pore size of the membrane electrode assembly (MEA) but a decrease in the particle size distribution and MEA thickness. The maximum oxygen-reduction reaction (ORR) activity and cell performance (745 mA/cm(2) and 520 mW/cm(2) at 0.6 V) were obtained at an electrocatalyst loading of 24.1 wt.% on a carbon support. (C) 2010 Elsevier Ltd. All rights reserved.
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