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Distinct Promotion of PEC Water Oxidation of Ta2O5/α-Fe2O3/Co–Ni PBA via Coupling Ni 3d with O 2p
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    Distinct Promotion of PEC Water Oxidation of Ta2O5/α-Fe2O3/Co–Ni PBA via Coupling Ni 3d with O 2p
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    • Yuan Guan
      Yuan Guan
      Jiangsu Province Key Laboratory of Fine Petrochemical Engineering, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, P. R. China
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    • Qiankun Deng
      Qiankun Deng
      Jiangsu Province Key Laboratory of Fine Petrochemical Engineering, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, P. R. China
      More by Qiankun Deng
    • Dayu Wu
      Dayu Wu
      Jiangsu Province Key Laboratory of Fine Petrochemical Engineering, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, P. R. China
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    • Shaomang Wang*
      Shaomang Wang
      School of Urban Construction, Changzhou University, Changzhou 213164, P. R. China
      *Email: [email protected]
    • Zhongyu Li
      Zhongyu Li
      Jiangsu Province Key Laboratory of Fine Petrochemical Engineering, School of Petrochemical Engineering, Changzhou University, Changzhou 213164, P. R. China
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    • Shicheng Yan*
      Shicheng Yan
      Eco-Materials and Renewable Energy Research Center (ERERC), College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, P. R. China
      *Email: [email protected]
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    • Zhigang Zou
      Zhigang Zou
      Eco-Materials and Renewable Energy Research Center (ERERC), College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, P. R. China
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    Inorganic Chemistry

    Cite this: Inorg. Chem. 2025, 64, 4, 2080–2095
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    https://doi.org/10.1021/acs.inorgchem.4c05042
    Published January 23, 2025
    Copyright © 2025 American Chemical Society

    Abstract

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    The development of robust and effective photoanodes is crucial for photoelectrochemical hydrogen production via total water splitting. Herein, the Ta2O5/α-Fe2O3/Co–Ni PBA (TFPB-1) photoanode was constructed by the compositing n-type Ta2O5 and n-type α-Fe2O3 followed by the deposition of p-type Co–Ni PBA. The IPCE of TFPB-1 was increased to 35.4% compared to 13.9% for Ta2O5 owing to the significantly improved light absorption efficiency, carrier separation efficiency and injection efficiency. The TFPB-1 achieved a current density of 2.78 mA cm–2 at 1.23 V (vs RHE), which was around 18.5 times that of Ta2O5. The OER overpotential over TFPB-1 was reduced to 0.59 V compared to 1.13 V for Ta2O5, resulting in a substantial reduction in the free energy of PEC water oxidation over TFPB-1. As a result, TFPB-1 exhibited remarkably enhanced photoelectrocatalytic activity for oxygen evolution through water oxidation.

    Copyright © 2025 American Chemical Society

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    Supporting Information

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    The Supporting Information is available free of charge at https://pubs.acs.org/doi/10.1021/acs.inorgchem.4c05042.

    • JV curve, bond length and angle, current density curve, cycle voltage curves, UV–vis DRS, Mott–Schottky curves, device of the determination of photogenerated electron flow direction, overpotential, kr and impedance fitting parameters, Vfb and Nd values, recent reports on the PEC performance (PDF)

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    Inorganic Chemistry

    Cite this: Inorg. Chem. 2025, 64, 4, 2080–2095
    Click to copy citationCitation copied!
    https://doi.org/10.1021/acs.inorgchem.4c05042
    Published January 23, 2025
    Copyright © 2025 American Chemical Society

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