Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1291125 | Journal of Power Sources | 2006 | 6 Pages |
Abstract
Open circuit voltages (OCVs) for a PEM fuel cell operating at 3.0 atm, 100% relative humidity and in the temperature range of 23–120 °C were measured. It was observed that the OCV decreased with increasing temperature. Analysis of the partial O2 and H2 pressures in the feed streams revealed that the decrease in partial pressures with temperature were largely responsible for the decrease in OCV. The difference between the theoretical and measured OCVs was analyzed based on the literature, calculations, and hydrogen crossover measurements at OCV. It was concluded that the difference in OCV is caused mainly by two factors, one is the mixed potential of the Pt/PtO catalyst surface, and the other is hydrogen crossover.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Jianlu Zhang, Yanghua Tang, Chaojie Song, Jiujun Zhang, Haijiang Wang,