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Nano Research

Article Title

Accelerated oxygen reduction on Fe/N/C catalysts derived from precisely-designed ZIF precursors

Authors

Ergui Luo, Laboratory of Advanced Power Sources, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei 230026, China
Chen Wang, Laboratory of Advanced Power Sources, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
Yang Li, Laboratory of Advanced Power Sources, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei 230026, China
Xian Wang, Laboratory of Advanced Power Sources, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei 230026, China
Liyuan Gong, Laboratory of Advanced Power Sources, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei 230026, China
Tuo Zhao, Laboratory of Advanced Power Sources, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei 230026, China
Zhao Jin, Laboratory of Advanced Power Sources, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
Junjie Ge, Laboratory of Advanced Power Sources, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei 230026, China
Changpeng Liu, Laboratory of Advanced Power Sources, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei 230026, China
Wei Xing, Laboratory of Advanced Power Sources, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China School of Applied Chemistry and Engineering, University of Science and Technology of China, Hefei 230026, China State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China

Keywords

electrocatalysis, fuel cells, oxygen reduction, Fe/N/C, single-atom catalysts

Abstract

Fe/N/C material is the most competitive alternative to precious-metal catalysts for oxygen reduction. In view of the present consensus on active centers, further effort is directed at maximizing the density of single Fe atoms. Here, the imperfections in commonly used doping strategy of Fe for the synthesis of zeolitic imidazolateframework (ZIF)-derived Fe/N/C catalysts are revealed. More importantly, a strikingly improved catalyst is obtained by a ‘second pyrolysis’ method and delivers a half-wave potential of 0.825 V (vs. RHE) in acidic media. The strong confinement effect of carbonaceous host accounts for the formation of dense single-atom sites and thus the high activity. Our findings will potentially facilitate future improvement of M/N/C catalysts.

Graphical Abstract

Publisher

Tsinghua University Press

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