Key issues to the preparation of methanol-tolerant cathode catalyst for DMFC

Y. C. Chen, W. L. Chen, M. Y. Lo, Y. Z. Chen, E. K. Feng, Y. W. Chen, T. C. Liu

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Platinum is by far the best catalyst for the cathodic oxygen reduction reaction (ORR) in DMFC However, the performance of Pt only catalyst has not reached a status set forth for the commercialization of DMFC The most serious problem to the cathode catalyst is mainly caused by the methanol crossover from the anode through the membrane. Methanol undergoes oxidation reaction at the cathode because Pt is one of the most active methanol oxidation catalysts. Mixed-potential due to cathodic methanol oxidation is detrimental to the performance of the cathode catalyst. Furthermore, incomplete oxidation of methanol also resulted in the accumulation of CO on the Pt surface. This CO poisoning effect greatly reduces the availability of Pt active site needed for the cathodic ORR. Active and methanol tolerant cathode catalyst is desperately needed to combat the adverse effect brought along by crossover methanol. The objective of this paper is to investigate the key issues for the preparation of catalyst with both high ORR activity and methanol tolerance.

Original languageEnglish
Title of host publicationECS Transactions - Proton Exchange Membrane Fuel Cells 9
Pages789-797
Number of pages9
Edition1 PART 1
DOIs
StatePublished - 2009
Event9th Proton Exchange Membrane Fuel Cell Symposium (PEMFC 9) - 216th Meeting of the Electrochemical Society - Vienna, Austria
Duration: 4 Oct 20099 Oct 2009

Publication series

NameECS Transactions
Number1 PART 1
Volume25
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Conference

Conference9th Proton Exchange Membrane Fuel Cell Symposium (PEMFC 9) - 216th Meeting of the Electrochemical Society
Country/TerritoryAustria
CityVienna
Period4/10/099/10/09

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