Impact of the Cathode Pt Loading on PEMFC Contamination by Several Airborne Contaminants
Proton exchange membrane fuel cells (PEMFCs) with 0.1 and 0.4 mg Pt cm<sup>−2</sup> cathode catalyst loadings were separately contaminated with seven organic species: Acetonitrile, acetylene, bromomethane, iso-propanol, methyl methacrylate, naphthalene, and propene. The lower c...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-02-01
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| Series: | Molecules |
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| Online Access: | https://www.mdpi.com/1420-3049/25/5/1060 |
| _version_ | 1818919908873863168 |
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| author | Jean St-Pierre Yunfeng Zhai |
| author_facet | Jean St-Pierre Yunfeng Zhai |
| author_sort | Jean St-Pierre |
| collection | DOAJ |
| description | Proton exchange membrane fuel cells (PEMFCs) with 0.1 and 0.4 mg Pt cm<sup>−2</sup> cathode catalyst loadings were separately contaminated with seven organic species: Acetonitrile, acetylene, bromomethane, iso-propanol, methyl methacrylate, naphthalene, and propene. The lower catalyst loading led to larger cell voltage losses at the steady state. Three closely related electrical equivalent circuits were used to fit impedance spectra obtained before, during, and after contamination, which revealed that the cell voltage loss was due to higher kinetic and mass transfer resistances. A significant correlation was not found between the steady-state cell voltage loss and the sum of the kinetic and mass transfer resistance changes. Major increases in research program costs and efforts would be required to find a predictive correlation, which suggests a focus on contamination prevention and recovery measures rather than contamination mechanisms. |
| first_indexed | 2024-12-20T01:13:20Z |
| format | Article |
| id | doaj.art-279f86402d3c476198a47b62629d752d |
| institution | Directory Open Access Journal |
| issn | 1420-3049 |
| language | English |
| last_indexed | 2024-12-20T01:13:20Z |
| publishDate | 2020-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Molecules |
| spelling | doaj.art-279f86402d3c476198a47b62629d752d2022-12-21T19:58:38ZengMDPI AGMolecules1420-30492020-02-01255106010.3390/molecules25051060molecules25051060Impact of the Cathode Pt Loading on PEMFC Contamination by Several Airborne ContaminantsJean St-Pierre0Yunfeng Zhai1Hawaii Natural Energy Institute, University of Hawaii—Manoa, Honolulu, HI 96822, USAHawaii Natural Energy Institute, University of Hawaii—Manoa, Honolulu, HI 96822, USAProton exchange membrane fuel cells (PEMFCs) with 0.1 and 0.4 mg Pt cm<sup>−2</sup> cathode catalyst loadings were separately contaminated with seven organic species: Acetonitrile, acetylene, bromomethane, iso-propanol, methyl methacrylate, naphthalene, and propene. The lower catalyst loading led to larger cell voltage losses at the steady state. Three closely related electrical equivalent circuits were used to fit impedance spectra obtained before, during, and after contamination, which revealed that the cell voltage loss was due to higher kinetic and mass transfer resistances. A significant correlation was not found between the steady-state cell voltage loss and the sum of the kinetic and mass transfer resistance changes. Major increases in research program costs and efforts would be required to find a predictive correlation, which suggests a focus on contamination prevention and recovery measures rather than contamination mechanisms.https://www.mdpi.com/1420-3049/25/5/1060proton exchange membrane fuel cellsdurabilitycontaminationcathodecatalyst loading |
| spellingShingle | Jean St-Pierre Yunfeng Zhai Impact of the Cathode Pt Loading on PEMFC Contamination by Several Airborne Contaminants Molecules proton exchange membrane fuel cells durability contamination cathode catalyst loading |
| title | Impact of the Cathode Pt Loading on PEMFC Contamination by Several Airborne Contaminants |
| title_full | Impact of the Cathode Pt Loading on PEMFC Contamination by Several Airborne Contaminants |
| title_fullStr | Impact of the Cathode Pt Loading on PEMFC Contamination by Several Airborne Contaminants |
| title_full_unstemmed | Impact of the Cathode Pt Loading on PEMFC Contamination by Several Airborne Contaminants |
| title_short | Impact of the Cathode Pt Loading on PEMFC Contamination by Several Airborne Contaminants |
| title_sort | impact of the cathode pt loading on pemfc contamination by several airborne contaminants |
| topic | proton exchange membrane fuel cells durability contamination cathode catalyst loading |
| url | https://www.mdpi.com/1420-3049/25/5/1060 |
| work_keys_str_mv | AT jeanstpierre impactofthecathodeptloadingonpemfccontaminationbyseveralairbornecontaminants AT yunfengzhai impactofthecathodeptloadingonpemfccontaminationbyseveralairbornecontaminants |