|
|||||
|
|
Pyrolyzed Cobalt Corrole as a Potential Non‐Precious Catalyst for Fuel Cells |
|
| Authors: | Hsin‐Chih Huang Indrajit Shown Sun‐Tang Chang Hsin‐Cheng Hsu He‐Yun Du Ming‐Cheng Kuo Ken‐Tsung Wong Sea‐Fu Wang Chen‐Hao Wang Li‐Chyong Chen Kuei‐Hsien Chen |
| Affiliation: | 1. Institute of Atomic and Molecular Science, Academia Sinica, Taipei 10617, Taiwan;2. Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan;3. Department of Materials and Mineral, Resources Engineering, National Taipei University of Technology, Taipei 10608, Taiwan;4. Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan;5. Center for Condensed Matter Sciences, National Taiwan University, Taipei 10617, Taiwan |
| Abstract: | 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. |
| Keywords: | fuel cells oxygen reduction reactions non‐precious metal catalysts corrole |