Preparation of Fe-BN-C catalysts derived from ZIF-8 and their performance in the oxygen reduction reaction

Enhancing the oxygen reduction reaction (ORR) activity and stability of the fuel cell cathode electrocatalysts and reducing their costs are critical. In response to this need, Fe, B, and N co-doped hollow mesoporous carbon materials were prepared by a simple chemical doping one-step pyrolysis method...

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Bibliographic Details
Published in:RSC advances 2024-01, Vol.14 (7), p.467-4613
Main Authors: Ma, Jialu, Zhang, Wei, Yang, Feng, Zhang, Yingge, Xu, Xiaojun, Liu, Guipeng, Xu, Huiyu, Liu, Gaochong, Wang, Zhihui, Pei, Supeng
Format: Article
Language:English
Subjects:
Catalysts
Cell cathodes
Chemical reduction
Chemistry
Current density
Electrocatalysts
Fuel cells
Oxygen reduction reactions
Pyrolysis
Stability
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Summary:Enhancing the oxygen reduction reaction (ORR) activity and stability of the fuel cell cathode electrocatalysts and reducing their costs are critical. In response to this need, Fe, B, and N co-doped hollow mesoporous carbon materials were prepared by a simple chemical doping one-step pyrolysis method using ZIF-8 as a precursor. The results showed that the optimized catalyst displayed a higher limiting current density (6.154 mA cm −2 ) and half-wave potential (0.859 V), which showed significant enhancement compared with the Pt/C catalyst (5.487 mA cm −2 and 0.853 V). Moreover, the optimized catalyst had outstanding long-term stability with a current density retention higher than 91% after 36 000 s of stability testing. This work provides a facile strategy for the design of outstanding ORR performance of non-precious metal oxygen reduction catalysts. The nanostructured Fe-BN-C as high-efficiency ORR catalysts were prepared by a facile process.
ISSN:2046-2069
2046-2069
DOI:10.1039/d3ra07188j