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Journal of Nanomaterials
Volume 2015 (2015), Article ID 963173, 8 pages
http://dx.doi.org/10.1155/2015/963173
Research Article

Highly Durable Direct Methanol Fuel Cell with Double-Layered Catalyst Cathode

1School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China
2Key Laboratory of Chemical Engineering Process and Technology for High efficiency Conversion, College of Heilongjiang Province, Harbin 150080, China
3School of Chemical Engineering and Technology, Harbin Institute of Technology, Harbin 150001, China

Received 14 June 2015; Revised 23 June 2015; Accepted 29 June 2015

Academic Editor: Jun Chen

Copyright © 2015 Jing Liu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Polymer electrolyte membrane (PEM) is one of the key components in direct methanol fuel cells. However, the PEM usually gets attacked by reactive oxygen species during the operation period, resulting in the loss of membrane integrity and formation of defects. Herein, a double-layered catalyst cathode electrode consisting of Pt/CeO2-C as inner catalyst and Pt/C as outer catalyst is fabricated to extend the lifetime and minimize the performance loss of DMFC. Although the maximum power density of membrane electrode assembly (MEA) with catalyst cathode is slightly lower than that of the traditional one, its durability is significantly improved. No obvious degradation is evident in the MEA with double-layered catalyst cathode within durability testing. These results indicated that Pt/CeO2-C as inner cathode catalyst layer greatly improved the stability of MEA. The significant reason for the improved stability of MEA is the ability of CeO2 to act as free-radical scavengers.