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Chemical and Visible-Light-Driven Water Oxidation by Iron Complexes at pH 7–9: Evidence for Dual-Active Intermediates in Iron-Catalyzed Water Oxidation

Authors

  • Dr. Gui Chen,

    1. Department of Biology and Chemistry, City University of Hong Kong and Institute of Molecular Functional Materials, Tat Chee Avenue, Kowloon Tong, Hong Kong (China)
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  • Lingjing Chen,

    1. Department of Biology and Chemistry, City University of Hong Kong and Institute of Molecular Functional Materials, Tat Chee Avenue, Kowloon Tong, Hong Kong (China)
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  • Dr. Siu-Mui Ng,

    1. Department of Biology and Chemistry, City University of Hong Kong and Institute of Molecular Functional Materials, Tat Chee Avenue, Kowloon Tong, Hong Kong (China)
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  • Dr. Wai-Lun Man,

    1. Department of Biology and Chemistry, City University of Hong Kong and Institute of Molecular Functional Materials, Tat Chee Avenue, Kowloon Tong, Hong Kong (China)
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  • Prof. Tai-Chu Lau

    Corresponding author
    1. Department of Biology and Chemistry, City University of Hong Kong and Institute of Molecular Functional Materials, Tat Chee Avenue, Kowloon Tong, Hong Kong (China)
    • Department of Biology and Chemistry, City University of Hong Kong and Institute of Molecular Functional Materials, Tat Chee Avenue, Kowloon Tong, Hong Kong (China)
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  • The work described in this paper was supported by the Hong Kong University Grants Committee Area of Excellence Scheme (AoE/P-03-08) and General Research Fund (CityU 101408). The photochemical equipment used in this work was supported by a Special Equipment Grant from UGC (SEG_CityU02). The XRD and XPS used in this work were provided by the Institute of Advanced Materials of the Hong Kong Baptist University. Funding for the XRD and XPS were from the Special Equipment Grant from the University Grants Committee of the Hong Kong Special Administrative Region, China (SEG_HKBU06).

Abstract

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Ironing out a solution: Chemical and visible-light-driven water oxidation by iron complexes and iron salts at pH 7–9 has been investigated. The iron complexes and salts act as precatalysts (see scheme) to produce α-Fe2O3 nanoparticles that are the real catalyst for the water oxidation with a turnover number over 1000.

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