期刊
ADVANCED FUNCTIONAL MATERIALS
卷 31, 期 8, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.202008085
关键词
1D Fe; O-2; (3) template; atomic Fe‐ N; (4) sites; hierarchically porous nanorods; in situ polymerization; Zn‐ air batteries
类别
资金
- National Natural Science Foundation of China [21673064, 51802059, 21905070, 22075062, U1909213]
- China postdoctoral science foundation [2018M631938, 2018T110307, 2017M621284]
- Heilongjiang Postdoctoral Fund [LBH-Z17074, LBH-Z18066]
- Fundamental Research Funds for the Central Universities [HIT. NSRIF. 2019040, 2019041]
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- University of Waterloo
- Waterloo Institute for Nanotechnology
- NSERC
- National Research Council Canada
- Canadian Institutes of Health Research
- Province of Saskatchewan
- Western Economic Diversification Canada
- University of Saskatchewan
Iron-nitrogen-carbon materials are being studied as promising substitutes for Pt-based electrocatalysts for the oxygen reduction reaction. The 1D porous iron/nitrogen-doped carbon nanorods show exceptional ORR activities and demonstrate outstanding performance in Zn-air batteries.
Iron-nitrogen-carbon materials are being intensively studied as the most promising substitutes for Pt-based electrocatalysts for the oxygen reduction reaction (ORR). A rational design of the morphology and porous structure can promote the accessibility of the active site and the reactants/products transportation, accelerating the reaction kinetics. Herein, 1D porous iron/nitrogen-doped carbon nanorods (Fe/N-CNRs) with a hierarchically micro/mesoporous structure are prepared by pyrolyzing the in situ polymerized pyrrole on the surface of Fe-MIL-88B-derived 1D Fe2O3 nanorods (MIL: Material Institut Lavoisier). The Fe2O3 nanorods not only partially dissolve to generate Fe3+ for initiating polymerization but serve as templates to form the 1D structure during polymerization. Furthermore, the pyrrole coated Fe2O3 nanorod architecture prevents the porous structure from collapsing and protects Fe from aggregation to yield atomic Fe-N-4 moieties during carbonization. The obtained Fe/N-CNRs display exceptional ORR activities (E-1/2 = 0.90 V) and satisfactory long-term durabilities, exceeding those for Pt/C. Furthermore, the unprecedented Fe/N-CNRs catalytic performance is demonstrated with Zn-air batteries, including a superior maximum power density (181.8 mW cm(-2)), specific capacity (998.67 W h kg(-1)), and long-term durability over 100 h. The prominent performance stems from the unique 1D structure, hierarchical pore system, high surface area, and homogeneously dispersed single-atom Fe-N-4 moieties.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据