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  • Engineering the electronic states of Ni3FeN via zinc ion regulation for promoting oxygen electrocatalysis in rechargeable Zn-air batteries

    Author(s)
    He, Xiaoyang
    Tian, Yuhui
    Huang, Zengliang
    Xu, Li
    Wu, Jianchun
    Qian, Junchao
    Zhang, Jianming
    Li, Henan
    Griffith University Author(s)
    Tian, Yuhui
    Year published
    2021
    Metadata
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    Abstract
    Developing highly efficient bifunctional electrocatalysts for the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is pivotal for large-scale commercial applications of Zn–air batteries. Herein, a Zn-doped Ni3FeN/nitrogen-doped graphene (Zn–Ni3FeN/NG) electrocatalyst was designed and synthesized via a facile and reliable method. Thanks to the electronic synergistic effect, the stress caused by lattice distortion from the Zn dopant embedded in Ni3FeN can alter the electronic environment of the peripheral regions and generate more catalytical active sites. The resultant Zn–Ni3FeN/NG exhibits a remarkable ...
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    Developing highly efficient bifunctional electrocatalysts for the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is pivotal for large-scale commercial applications of Zn–air batteries. Herein, a Zn-doped Ni3FeN/nitrogen-doped graphene (Zn–Ni3FeN/NG) electrocatalyst was designed and synthesized via a facile and reliable method. Thanks to the electronic synergistic effect, the stress caused by lattice distortion from the Zn dopant embedded in Ni3FeN can alter the electronic environment of the peripheral regions and generate more catalytical active sites. The resultant Zn–Ni3FeN/NG exhibits a remarkable bifunctional electrochemical activity and stability, giving an overvoltage difference as low as 0.74 V. A Zn–air battery with Zn–Ni3FeN/NG as the air cathode shows an excellent cycle life and a high-power density of 158 mW cm−2, exceeding that of the apparatus based on commercial Pt/C and RuO2 (120 mW cm−2). Density functional theory (DFT) calculations reveal that the inserted Zn2+ ions can modulate the electronic structure of Ni3FeN and modify the adsorption/desorption features and lower the overall reaction barriers during the oxygen electrocatalytic reaction. This study offers a facile strategy for the design of highly efficient oxygen bifunctional electrocatalysts for energy-related technology.
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    Journal Title
    Journal of Materials Chemistry A
    Volume
    9
    Issue
    4
    DOI
    https://doi.org/10.1039/d0ta10370e
    Subject
    Macromolecular and Materials Chemistry
    Materials Engineering
    Interdisciplinary Engineering
    Science & Technology
    Physical Sciences
    Chemistry, Physical
    Energy & Fuels
    Publication URI
    http://hdl.handle.net/10072/402924
    Collection
    • Journal articles

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