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- Title
ZIF-8 Derived Graphene-Based Nitrogen-Doped Porous Carbon Sheets as Highly Efficient and Durable Oxygen Reduction Electrocatalysts.
- Authors
Zhong, Hai ‐ xia; Wang, Jun; Zhang, Yu ‐ wei; Xu, Wei ‐ lin; Xing, Wei; Xu, Dan; Zhang, Yue ‐ fei; Zhang, Xin ‐ bo
- Abstract
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.
- Subjects
OXIDATION-reduction reaction; ELECTROCATALYSIS; ZEOLITES; SEMICONDUCTOR doping; METAL-organic frameworks; OPEN-circuit voltage; X-ray diffraction
- Publication
Angewandte Chemie, 2014, Vol 126, Issue 51, p14459
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201408990