Pyrolyzed cobalt corrole as a potential non-precious catalyst for fuel cells
Journal
Advanced Functional Materials
Journal Volume
22
Journal Issue
16
Pages
3500-3508
Date Issued
2012
Author(s)
Huang, H.-C.
Shown, I.
Chang, S.-T.
Hsu, H.-C.
Du, H.-Y.
Kuo, M.-C.
Wong, K.-T.
Wang, S.-F.
Wang, C.-H.
Abstract
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 O 2 to H 2 O. The H 2 ‐O 2 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.
Publisher
John Wiley & Sons, Inc.
Type
journal article