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 language | English |
|---|---|
| Title of host publication | Proceedings of the 2nd European PEFC Forum |
| Number of pages | 848 |
| Volume | Volume 1 |
| Place of Publication | Switzerland |
| Publisher | Eueopean Fuel Cell Forum |
| Publication date | 2003 |
| Edition | 1 |
| Pages | 253-262 |
| ISBN (Print) | 3-905592-13-4 |
| Publication status | Published - 2003 |
| Event | 2nd European PEFC Forum - Lucerne, Switzerland Duration: 30 Jun 2003 → 4 Jul 2003 |
Conference
| Conference | 2nd European PEFC Forum |
|---|---|
| Country/Territory | Switzerland |
| City | Lucerne |
| Period | 30/06/2003 → 04/07/2003 |