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Insight into Fe Activating One-Dimensional α-Ni(OH)2 Nanobelts for Efficient Oxygen Evolution Reaction

  • Dan Wu
    Dan Wu
    National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, PR China
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  • Xinyi Shen
    Xinyi Shen
    National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, PR China
    More by Xinyi Shen
  • Xiaokang Liu
    Xiaokang Liu
    National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, PR China
    More by Xiaokang Liu
  • Tong Liu
    Tong Liu
    National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, PR China
    More by Tong Liu
  • Qiquan Luo
    Qiquan Luo
    Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601, China
    More by Qiquan Luo
  • Dong Liu
    Dong Liu
    National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, PR China
    More by Dong Liu
  • Tao Ding
    Tao Ding
    National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, PR China
    More by Tao Ding
  • Tao Chen
    Tao Chen
    National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, PR China
    More by Tao Chen
  • Lan Wang
    Lan Wang
    National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, PR China
    More by Lan Wang
  • Linlin Cao*
    Linlin Cao
    National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, PR China
    University of Science and Technology of China, Hefei National Laboratory for Physical Sciences at the Microscale, Hefei 230029, Anhui, PR China
    *Email: [email protected]
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  • , and 
  • Tao Yao*
    Tao Yao
    National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, PR China
    *Email: [email protected]
    More by Tao Yao
Cite this: J. Phys. Chem. C 2021, 125, 37, 20301–20308
Publication Date (Web):September 9, 2021
https://doi.org/10.1021/acs.jpcc.1c05148
Copyright © 2021 American Chemical Society
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Abstract

Development of high-efficiency and inexpensive oxygen evolution reaction (OER) catalysts is highly desirable for water electrolysis devices and rechargeable metal–air batteries. Herein, we report novel one-dimensional (1D) Fe-doped α-Ni(OH)2 nanobelts as OER-active electrocatalysts. In-depth characterizations revealed that Fe atoms are incorporated into the lattice of Ni(OH)2, resulting in the strong electron interaction with active Ni sites. Moreover, a contraction of Ni–O bond distance induced by Fe is revealed by operando X-ray absorption fine structure spectroscopy under OER working condition, which leads to a near-optimized adsorption of oxygen intermediates. Consequently, the Fe-doped α-Ni(OH)2 nanobelts deliver significantly promoted OER activity in alkaline solutions with a low OER overpotential of 236 mV at 10 mA cm–2 along with good stability. This work provides a strategy for developing efficiently non-noble metal catalysts, gives insights to the Fe doping effect and the dynamic evolution of disturbed atomic and electronic structure of Ni active sites.

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  • Detailed synthesis and characterization methods, supplementary experimental results of SEM, TEM, XPS and supplementary theory calculation and supplementary tables of structural parameters extracted from quantitative EXAFS curve-fittings (PDF)

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