SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2022, Vol. 43 ›› Issue (3): 161-168.DOI: 10.1016/j.cjche.2022.02.017

• • 上一篇    下一篇

A dual metal-organic framework strategy for synthesis of FeCo@NC bifunctional oxygen catalysts for clean energy application

Jun Chen, Liandong Li, Liu Yang, Chang Chen, Shitao Wang, Yan Huang, Dapeng Cao   

  1. State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China
  • 收稿日期:2021-09-13 修回日期:2022-02-23 出版日期:2022-03-28 发布日期:2022-04-28
  • 通讯作者: Yan Huang,E-mail:huangyan@mail.buct.edu.cn
  • 基金资助:
    This work is supported by the National Key Research and Development Program of China (2019YFA0210300) and the National Natural Science Foundation of China (21905016).

A dual metal-organic framework strategy for synthesis of FeCo@NC bifunctional oxygen catalysts for clean energy application

Jun Chen, Liandong Li, Liu Yang, Chang Chen, Shitao Wang, Yan Huang, Dapeng Cao   

  1. State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China
  • Received:2021-09-13 Revised:2022-02-23 Online:2022-03-28 Published:2022-04-28
  • Contact: Yan Huang,E-mail:huangyan@mail.buct.edu.cn
  • Supported by:
    This work is supported by the National Key Research and Development Program of China (2019YFA0210300) and the National Natural Science Foundation of China (21905016).

摘要: Developing high efficient bifunctional oxygen electrocatalysts for clean energy applications like Zin-air battery (ZAB) is highly desired, because it would reduce the cost and speed up the practical application of ZAB. Here we use a dual metal–organic framework (MOF) synthesis strategy to prepare the N-doped carbon supported bimetallic FeCo nanoparticle catalysts (marked as FeCo@NC) by pyrolysis of ZnCo-ZIF/MIL-101(Fe) composite. The FeCo@NC exhibits remarkable electrocatalytic activity for ORR with half-wave potential of 0.89 V vs. the reversible hydrogen electrode (RHE) and robust durability for both ORR and OER (oxygen reduction reaction and oxygen evolution reaction), which is attributed to the generation of Fe0.26Co0.74 crystalline phase and mesopores due to the dual-MOF synthesis strategy. The rechargeable ZAB based on FeCo@NC air electrode shows a maximum energy density of 139.6mW·cm-2 and excellent cyclic stability over 130 h, significantly surpassing the Pt and Ir-based ZAB. The present work provides a useful dual-MOF synthesis strategy for preparing high-performance multifunctional catalysts for ORR, OER and hydrogen evolution reaction (HER).

关键词: Metal Organic Frameworks, Zeolite imidazole framework, Bifunctional electrocatalysts, FeCo alloy, Zn-air battery

Abstract: Developing high efficient bifunctional oxygen electrocatalysts for clean energy applications like Zin-air battery (ZAB) is highly desired, because it would reduce the cost and speed up the practical application of ZAB. Here we use a dual metal–organic framework (MOF) synthesis strategy to prepare the N-doped carbon supported bimetallic FeCo nanoparticle catalysts (marked as FeCo@NC) by pyrolysis of ZnCo-ZIF/MIL-101(Fe) composite. The FeCo@NC exhibits remarkable electrocatalytic activity for ORR with half-wave potential of 0.89 V vs. the reversible hydrogen electrode (RHE) and robust durability for both ORR and OER (oxygen reduction reaction and oxygen evolution reaction), which is attributed to the generation of Fe0.26Co0.74 crystalline phase and mesopores due to the dual-MOF synthesis strategy. The rechargeable ZAB based on FeCo@NC air electrode shows a maximum energy density of 139.6mW·cm-2 and excellent cyclic stability over 130 h, significantly surpassing the Pt and Ir-based ZAB. The present work provides a useful dual-MOF synthesis strategy for preparing high-performance multifunctional catalysts for ORR, OER and hydrogen evolution reaction (HER).

Key words: Metal Organic Frameworks, Zeolite imidazole framework, Bifunctional electrocatalysts, FeCo alloy, Zn-air battery