期刊
NANO ENERGY
卷 61, 期 -, 页码 60-68出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nanoen.2019.04.033
关键词
Oxygen reduction reaction; Metal organic framework; Single-atom catalyst; Non-precious metal catalysts
类别
资金
- National Key R&D Program of China [2017YFB0102900]
- Research Grant Council of the Hong Kong Special Administrative Region [N_ HKUST610/17]
- Shenzhen Science and Technology Innovation Commission [JCYJ20180507183818040]
- Guangdong Special Fund for Science and Technology Development (Hong Kong Technology Cooperation Funding Scheme) [201704030019, 201704030065]
- U.S. Department of Energy (DOE), Office of Energy Efficiency and Renewable Energy, Vehicle Technologies Office
- U.S. Department of Energy [DE-AC02-06CH11357]
- U.S. DOE [DE-AC0-06CH11357]
- Canadian Light Source
Iron and nitrogen co-doped carbon (Fe-N-C) catalysts hold great promise to replace platinum group metal used for the oxygen reduction reaction (ORR) in low-temperature fuel cells. However, general synthesis routes require tedious acid washing and extensive heat treatment, usually resulting in uncontrollable morphologies and undesirable compounds. In this work, a zeolitic imidazolate framework (ZIF-8) was employed as a self-template for one-pot synthesis of a Fe-N-C catalyst consisting of uniformly dispersed Fe single atoms. Atomically dispersed Fe atoms were well distributed along the edges of the porous carbon matrix. Each of the Fe atoms was coordinated with four N atoms in the plane and two O atoms in the axial direction. The optimized Fe-N-C catalyst showed excellent ORR activities with half-wave potentials of 0.81 and 0.90 V in acidic and alkaline solutions, respectively. The results may be important for the optimization of single-atom-based catalysts for various reactions.
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