| Autor: |
Uddin, Aman, Park, Jaehyung, Ganesan, Selvarani, Pasaogullari, Ugur, Bonville, Leonard J., Molter, Trent |
| Zdroj: |
ECS Transactions; August 2015, Vol. 66 Issue: 24 p29-36, 8p |
| Abstrakt: |
Cationic contamination in polymer electrolyte fuel cells (PEFC) is investigated by contaminating a catalyst coated membrane (CCM) in Ca2+ solution prior to a long term durability test. The cathode catalyst layer of the contaminated CCM becomes significantly thinner over the entire active area of the CCM as compared to an as-received, uncontaminated CCM. It is found that there is no change in the total Pt content in cathode catalyst layer, and the only possible element loss that may cause significant catalyst layer thickness change is carbon. Since the cation tends to accumulate in the cathode catalyst layer during the fuel cell test, it is hypothesized that the cation accumulation in the catalyst layer can render the Pt inactive, and either directly or indirectly increases the carbon oxidation reaction rate resulting in catalyst layer thinning. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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