Pyrolyzed Cobalt Corrole as a Potential Non-Precious Catalyst for Fuel Cells
| Autor: | Kuei-Hsien Chen, Li-Chyong Chen, Hsin-Cheng Hsu, Ming-Cheng Kuo, Sea-Fu Wang, Indrajit Shown, Chen-Hao Wang, Sun-Tang Chang, Hsin-Chih Huang, He-Yun Du, Ken-Tsung Wong |
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| Rok vydání: | 2012 |
| Předmět: |
Materials science
Inorganic chemistry chemistry.chemical_element Condensed Matter Physics Cathode Electronic Optical and Magnetic Materials law.invention Catalysis Biomaterials chemistry.chemical_compound chemistry Oxidation state law Electrochemistry Fuel cells Corrole Polymer electrolyte fuel cells Pyrolysis Cobalt |
| Zdroj: | Advanced Functional Materials. 22:3500-3508 |
| ISSN: | 1616-301X |
| DOI: | 10.1002/adfm.201200264 |
| Popis: | Non-precious metal catalysts of the oxygen reduction reaction are highly favored for use in polymer electrolyte fuel cells (PEFC) because of their relatively low cost. Here, a new carbon-black-supported pyrolyzed Co-corrole (py-Co-corrole/C) catalyst of the oxygen reduction reaction (ORR) in a PEFC cathode is demonstrated to have high catalytic performance. The py-Co-corrole/C at 700 °C exhibits optimized ORR activity and participates in a direct four-electron reduction pathway for the reduction of O2 to H2O. The H2-O2 PEFC test of py-Co-corrole/C in the cathode reveals a maximum power density of 275 mW cm−2, which yields a higher performance and a lower Co loading than previous studies of Co-based catalysts for PEFCs. The enhancement of the ORR activity of py-Co-corrole/C is attributable to the four-coordinated Co-corrole structure and the oxidation state of the central cobalt. |
| Databáze: | OpenAIRE |
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