Volume 38 Issue 1
Jan.  2023
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XU Xiang-xiang, ZHANG Nian-chao, WANG Jun-ying, WANG Jun-zhong. The synthesis of iron-nitrogen sites embedded in electrospun carbon nanofibers with an excellent oxygen reduction reaction activity in alkaline/acidic media. New Carbon Mater., 2023, 38(1): 154-161. doi: 10.1016/S1872-5805(22)60649-8
Citation: XU Xiang-xiang, ZHANG Nian-chao, WANG Jun-ying, WANG Jun-zhong. The synthesis of iron-nitrogen sites embedded in electrospun carbon nanofibers with an excellent oxygen reduction reaction activity in alkaline/acidic media. New Carbon Mater., 2023, 38(1): 154-161. doi: 10.1016/S1872-5805(22)60649-8

The synthesis of iron-nitrogen sites embedded in electrospun carbon nanofibers with an excellent oxygen reduction reaction activity in alkaline/acidic media

doi: 10.1016/S1872-5805(22)60649-8
Funds:  We acknowledge the financial support by grants from National Natural Science Foundation of China (22179138) , Natural Science Foundation of Shanxi (20210302123005) and Shanxi Major Project (20181102026)
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  • Author Bio:

    XU Xiang-xiang, Master degree. E-mail: 615809691@qq.com

  • Corresponding author: WANG Jun-ying, Associate professor. E-mail: wangjy@sxicc.ac.cn; WANG Jun-zhong, Professor. E-mail: wangjz@ahu.edu.cn
  • Received Date: 2022-06-01
  • Rev Recd Date: 2022-08-30
  • Available Online: 2022-09-14
  • Publish Date: 2023-01-06
  • Metal-nitrogen carbon catalysts have received great attention in the field of gas-evolving electrocatalysis due to their high activity, large specific surface area and efficient gas diffusion paths. A solution of porphyrin iron, g-C3N4 and polyacrylonitrile in N,N-dimethylformamide was sonicated and electrospun into doped polyacrylonitrile nanofibers (NFs), and the NFs were then stabilized and carbonized at 900 °C to prepare Fe-N/CNF catalyst for oxygen reduction reaction (ORR). It was found that the addition of g-C3N4 to the electrospinning precursor led to the formation of abundant Fe-N species in Fe3+ and Fe2+ valence states, while Fe3C nanoparticles were formed without adding g-C3N4. Compared to Fe3C/CNF prepared without g-C3N4, the Fe-N/CNF catalyst presents an 4e improved oxygen reduction reaction activity in both alkaline and acidic media. Furthermore, as a cathode in Zn-air batteries, the Fe-N/CNF catalyst exhibits high performance with an open-circuit voltage of 1.49 V, a power density of 146 mW cm−2 and a specific capacity of 703 mAh g−1. This work suggests a way to prepare metal-nitrogen-carbon catalysts for energy-related electrocatalytic applications.
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