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Nanofiber-Based Oxygen Reduction Electrocatalysts with Improved Mass Transfer Kinetics in a Meso-Porous Structure and Enhanced Reaction Kinetics by Confined Fe and Fe 3 C Particles for Anion-Exchange Membrane Fuel Cells

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  • Wenzhe Luo

    (Fuel Cell System and Engineering Laboratory, Key Laboratory of Fuel Cells & Hybrid Power Sources, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
    University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing 100049, China)

  • Longsheng Cao

    (Fuel Cell System and Engineering Laboratory, Key Laboratory of Fuel Cells & Hybrid Power Sources, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China)

  • Ming Hou

    (Fuel Cell System and Engineering Laboratory, Key Laboratory of Fuel Cells & Hybrid Power Sources, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China)

  • Liang He

    (Fuel Cell System and Engineering Laboratory, Key Laboratory of Fuel Cells & Hybrid Power Sources, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China)

  • Yawen Zhou

    (Fuel Cell System and Engineering Laboratory, Key Laboratory of Fuel Cells & Hybrid Power Sources, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
    University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing 100049, China)

  • Feng Xie

    (Fuel Cell System and Engineering Laboratory, Key Laboratory of Fuel Cells & Hybrid Power Sources, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China)

  • Zhigang Shao

    (Fuel Cell System and Engineering Laboratory, Key Laboratory of Fuel Cells & Hybrid Power Sources, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China)

Abstract

The development of high-performance nonprecious metal catalysts for oxygen reduction reactions is critical for the commercialization of fuel cells. In this paper, we report a non-precious catalyst with high-performance, in which Fe and Fe 3 C is embedded in nitrogen-doped carbon nanofibers (MIL-N-CNFs) by co-electrospinning Fe-MIL and polyacrylonitrile (PAN) and pyrolyzing. The mass ratio of Fe-MIL to PAN in the precursors and the pyrolysis temperature were optimized to be 1.5 and treated at 800 °C, respectively. The optimized catalyst exhibited an onset potential of 0.950 V and a half-wave potential of 0.830 V in alkaline electrolytes, thanks to the improved mass transfer kinetics in a meso-porous structure and enhanced reaction kinetics by confined Fe and Fe 3 C particles. Additionally, the optimized catalyst showed a better methanol tolerance than the commercial 20 wt.% Pt/C, indicating a potential application in direct methanol fuel cells. Serving as the cathode in CCM, the anion-exchange membrane fuel cell reaches a power density of 192 mW cm −2 at 428 mA cm −2 and 80 °C.

Suggested Citation

  • Wenzhe Luo & Longsheng Cao & Ming Hou & Liang He & Yawen Zhou & Feng Xie & Zhigang Shao, 2022. "Nanofiber-Based Oxygen Reduction Electrocatalysts with Improved Mass Transfer Kinetics in a Meso-Porous Structure and Enhanced Reaction Kinetics by Confined Fe and Fe 3 C Particles for Anion-Exchange ," Energies, MDPI, vol. 15(11), pages 1-15, May.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:11:p:4029-:d:828231
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    References listed on IDEAS

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    1. Hanif, Saadia & Iqbal, Naseem & Shi, Xuan & Noor, Tayyaba & Ali, Ghulam & Kannan, A.M., 2020. "NiCo–N-doped carbon nanotubes based cathode catalyst for alkaline membrane fuel cell," Renewable Energy, Elsevier, vol. 154(C), pages 508-516.
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