期刊
ACS ENERGY LETTERS
卷 2, 期 2, 页码 504-511出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsenergylett.6b00686
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资金
- National Natural Science Foundation of China [51322205, 21371014]
- AIST
- JSPS [26289379]
- [25390023]
- Grants-in-Aid for Scientific Research [26289379] Funding Source: KAKEN
Hierarchical graphitic porous carbon architectures with atomically dispersed Fe and N doping have been fabricated from a metal organic framework (MOF) composite by using a facile strategy, which show high specific surface areas, hierarchical pore structures with macro/meso/micro multimodal pore size distributions, abundant surface functionality with single-atom dispersed N and Fe doping, and improved hydrophilicity. Detailed analyses unambiguously disclosed the main active sites of doped N atoms and FeNx species in the catalyst. The resultant catalyst affords high catalytic performance for oxygen reduction, outperforming the benchmark Pt catalyst and many state-of-the-art noble-metal-free catalysts in alkaline media, particularly in terms of the onset and half-wave potentials and durability. Such catalytic performance demonstrates the significant advantages of the unique hierarchical porous structure with efficient atomic doping, which provides a high density of accessible active sites for much improved mass and charge transports.
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