Volume 11, Issue 1 2200992
Research Article

Preparation of F and N Co-Doped Fe–N–C Catalyst and Evaluation of its Oxygen Reduction Performance

Xinfu He

Xinfu He

School of Chemistry and Chemical Engineering, Xi'an University of Science and Technology, Xi'an, 710054 China

Key Laboratory of Coal Resources Exploration and Comprehensive Utilization, Ministry of Natural Resource, Xi'an, 710021 China

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Liaobo Chang

Liaobo Chang

School of Chemistry and Chemical Engineering, Xi'an University of Science and Technology, Xi'an, 710054 China

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Keke Li

Keke Li

School of Chemistry and Chemical Engineering, Xi'an University of Science and Technology, Xi'an, 710054 China

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Hongju Wu

Hongju Wu

School of Chemistry and Chemical Engineering, Xi'an University of Science and Technology, Xi'an, 710054 China

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Yong Tang

Yong Tang

School of Chemistry and Chemical Engineering, Xi'an University of Science and Technology, Xi'an, 710054 China

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Fan Gao

Fan Gao

School of Chemistry and Chemical Engineering, Xi'an University of Science and Technology, Xi'an, 710054 China

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Xingtang Li

Xingtang Li

School of Chemistry and Chemical Engineering, Xi'an University of Science and Technology, Xi'an, 710054 China

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Yating Zhang

Corresponding Author

Yating Zhang

School of Chemistry and Chemical Engineering, Xi'an University of Science and Technology, Xi'an, 710054 China

Key Laboratory of Coal Resources Exploration and Comprehensive Utilization, Ministry of Natural Resource, Xi'an, 710021 China

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Anning Zhou

Anning Zhou

School of Chemistry and Chemical Engineering, Xi'an University of Science and Technology, Xi'an, 710054 China

Key Laboratory of Coal Resources Exploration and Comprehensive Utilization, Ministry of Natural Resource, Xi'an, 710021 China

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First published: 09 November 2022

Abstract

The problems of underdeveloped pores and high electrochemical impedance of oxygen reduction reaction (ORR) catalysts need to be urgently addressed. Heteroatoms F and N are doped on precursor Fe-zeolitic imidazolate framework (ZIF)-8 to increase the activity of Fe-ZIF-8-derived porous carbon materials and a noble metal-free high-activity ORR catalyst F–N/FeNC with 3D interconnected porous structure and high conductivity is successfully prepared. Experiments show that the synergistic effect of CF ionic bonds, pyridinic-N, pyrrolic-N, graphitic-N, FeNx sites, and CF semi-ionic bonds in F–N/FeNC can improve the ORR activity of the F–N/FeNC. The developed F–N/FeNC is advantageous with excellent specific surface area, ultra-high electrical conductivity, and extremely high ORR mass transfer efficiency. As such, the F–N/FeNC has a high onset potential of 0.95 V (vs RHE) and a half-wave potential of 0.84 V (vs RHE), implying excellent ORR performance even better than commercially available Pt/C catalyst. In addition, the carefully prepared F–N/FeNC demonstrated higher long-term durability and excellent resistance to methanol influence compared with commercially available Pt/C catalyst. The developed strategy provides new insights into heteroatom-doped metal–organic frameworks as a precursor of ORR catalysts.

Conflict of Interest

The authors declare no conflict of interest.

Data Availability Statement

Research data are not shared.

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