Photocatalytic Aerobic Oxidation of Alcohols on TiO2: The Acceleration Effect of a Brønsted Acid

Authors

  • Dr. Qi Wang,

    1. Key Laboratory of Photochemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, The Chinese Academy of Science, Beijing 100190 (China)
    2. School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310018 (China)
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  • Dr. Miao Zhang,

    1. Key Laboratory of Photochemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, The Chinese Academy of Science, Beijing 100190 (China)
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  • Prof. Chuncheng Chen,

    1. Key Laboratory of Photochemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, The Chinese Academy of Science, Beijing 100190 (China)
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  • Prof. Wanhong Ma,

    1. Key Laboratory of Photochemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, The Chinese Academy of Science, Beijing 100190 (China)
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  • Prof. Jincai Zhao

    1. Key Laboratory of Photochemistry, Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, The Chinese Academy of Science, Beijing 100190 (China)
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  • Financial support from 973 project (Nos. 2010CB933503 and 2007CB613306), NSFC (Nos. 20920102034, 20772129, and 20877076), and CAS is gratefully acknowledged.

Abstract

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Up to speed: Brønsted acids adsorbed onto TiO2 dramatically accelerated the photocatalytic oxidation of alcohols without any loss of selectivity (see scheme). This effect results from the decomposition of the Ti species, having a side-on peroxide, on the TiO2 surface. The decomposition is aided by the Brønsted acid, thereby regenerating the active Ti sites on the surface of the catalyst.

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