期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 53, 期 51, 页码 14235-14239出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201408990
关键词
electrocatalysts; nitrogen doping; oxygen reduction reaction; porous carbon sheets
资金
- 100 Talents Programme of the Chinese Academy of Sciences
- National Program on Key Basic Research Project of China (973 Program) [2014CB932300, 2012CB215500]
- National Natural Science Foundation of China [21422108, 51472232, 21271168]
Nitrogen-doped carbon (NC) materials have been proposed as next-generation oxygen reduction reaction (ORR) catalysts to significantly improve scalability and reduce costs, but these alternatives usually exhibit low activity and/or gradual deactivation during use. Here, we develop new 2D sandwich-like zeolitic imidazolate framework (ZIF) derived graphene-based nitrogen-doped porous carbon sheets (GNPCSs) obtained by in situ growing ZIF on graphene oxide (GO). Compared to commercial Pt/C catalyst, the GNPCSs show comparable onset potential, higher current density, and especially an excellent tolerance to methanol and superior durability in the ORR. Those properties might be attributed to a synergistic effect between NC and graphene with regard to structure and composition. Furthermore, higher open-circuit voltage and power density are obtained in direct methanol fuel cells.
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