CO tolerance by the PEMFC operational at temperatures up to 200°C

Qingfeng Li, Ronghuan He, Ji-An Gao, Jens Oluf Jensen, Niels Bjerrum

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearch

Abstract

The CO poisoning effect on carbon-supported platinum catalysts in polymer electrolyte membrane fuel cells has been investigated in a temperature range from 125 to 200°C with the phosphoric acid-doped polybenzimidazole membranes as electrolyte. The effect is very temperature-dependent and can be sufficiently suppressed at elevated temperature. By defining a poisoning factor as less than 2% of power loss due to the poisoning effect, it is evaluated that 3% CO in hydrogen can be tolerated at current densities up to 0.7 A/cm2 at 200oC, while at 125oC 0.1% CO in hydrogen can be tolerated at current densities lower than 0.25 A/cm2. For comparison, the tolerance is only 0.0025 % CO (25 ppm) at 80°C at current densities up to 0.15 A/cm². The effect of CO2 in hydrogen was also studied. At 175°C, 25% CO2 in the fuel stream showed only the dilution effect.
Original languageEnglish
Title of host publicationProceedings of the 2nd European PEFC Forum
Number of pages848
VolumeVolume 1
Place of PublicationSwitzerland
PublisherEueopean Fuel Cell Forum
Publication date2003
Edition1
Pages253-262
ISBN (Print)3-905592-13-4
Publication statusPublished - 2003
Event2nd European PEFC Forum - Lucerne, Switzerland
Duration: 30 Jun 20034 Jul 2003

Conference

Conference2nd European PEFC Forum
CountrySwitzerland
CityLucerne
Period30/06/200304/07/2003

Cite this

Li, Q., He, R., Gao, J-A., Jensen, J. O., & Bjerrum, N. (2003). CO tolerance by the PEMFC operational at temperatures up to 200°C. In Proceedings of the 2nd European PEFC Forum (1 ed., Vol. Volume 1, pp. 253-262). Eueopean Fuel Cell Forum.