期刊
CHEMPLUSCHEM
卷 87, 期 7, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cplu.202200168
关键词
conjugated microporous polymers; oxygen reduction reaction; porous carbon; porphyrin
资金
- National Natural Science Foundation of China [21975113, 22006061]
- Support Program for Hongliu Young Teachers of Lanzhou University of Technology [061805]
- Outstanding Postgraduate Innovation Star of Gansu Province [2021CXZX-469]
In this study, N-doped and Fe/N dual-doped porous carbons were synthesized as catalysts for the oxygen reduction reaction (ORR) through high-temperature pyrolysis of porphyrin-based conjugated microporous polymers. The as-prepared carbon samples exhibited high electrocatalytic activity comparable to commercial Pt/C catalyst, along with good durability and methanol tolerance. This metal-free catalyst has great potential for ORR applications.
The cathodic oxygen reduction reaction (ORR) is important in the development of renewable energy devices, to produce novel and non-precious metal catalysts with high electrocatalytic activity to reduce the consumption of non-renewable platinum (Pt) catalyst. In this work, we developed N-doped and Fe/N dual-doped porous carbons as catalysts for ORR simply by high-temperature pyrolysis of porphyrin-based conjugated microporous polymers (CMPs). By combination of heteroatom doping, highly porous structure and tubular morphology, the as-prepared carbon samples exhibited high electrocatalytic activity with 4-electron transfer mechanism, nearly close to the commercial Pt/C catalyst. In particular, among these samples, the Fe/N-CMP-1000 displayed a higher onset potential (0.95 eV), positive half-wave potential (0.85 eV) and limiting current density value (5.1 mA cm(-2)) as well as good durability and better methanol tolerance contrasting with Pt/C catalyst, suggesting that the as-prepared metal-free catalysts from porphyrin-based CMPs show great potential for ORR.
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