Chinese Journal of Catalysis ›› 2023, Vol. 45: 120-131.DOI: 10.1016/S1872-2067(22)64181-0

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Controlling the reactions of free radicals with metal-radical interaction

Zhipeng Huanga,b,1, Yang Yangc,1, Junju Mua, Genheng Lia,d, Jianyu Hana,b, Puning Rena,b, Jian Zhanga, Nengchao Luoa, Ke-Li Hanc, Feng Wanga,*()   

  1. aState Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences,Dalian 116023, Liaoning, China
    bUniversity of Chinese Academy of Sciences, Beijing 100049, China
    cState Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, Liaoning, China
    dZhang Dayu School of Chemistry, Dalian University of Technology, Dalian 116024, Liaoning, China
  • Received:2022-09-22 Accepted:2022-10-09 Online:2023-02-18 Published:2023-01-10
  • Contact: Feng Wang
  • About author:First author contact:

    1Contributed equally to this work.

  • Supported by:
    Ministry of Science and Technology of the People's Republic of China(2018YFE0118100);National Natural Science Foundation of China(22025206);National Natural Science Foundation of China(21721004);National Natural Science Foundation of China(21991090);National Natural Science Foundation of China(22002159);National Natural Science Foundation of China(22088102);National Natural Science Foundation of China(21833009);Liaoning Revitalization Talents Program(XLYC2002012);Liaoning Revitalization Talents Program(XLYC1802126);Joint Fund of the Yulin University and the Dalian National Laboratory for Clean Energy(YLU-DNL Fund 2021019);Scientific Instrument Developing Project of the Chinese Academy of Sciences(YJKYYQ20190003);Dalian Science and Technology Innovation Fund(2019J12GX031);Dalian Institute of Chemical Physics, Chinese Academy of Sciences(DICP I202009)

Abstract:

Radicals are key intermediates in numerous reactions. Their high reactivity enables various transformations to occur under mild conditions, however, also brings great challenges to control their reactions especially over heterogeneous catalysts. Here we propose to use metal nanoparticles to directly steer the conversion of free radical species. Results from photocatalytic reactions, in situ transient absorption spectroscopy, and theoretical simulation demonstrate that supported Pd nanoparticles can efficiently stabilize free radical species generated from photo-excited TiO2, and thus manipulate their conversion on catalyst surface, owing to the enhanced electronic interactions between metal and radical species. These understandings are crucial for the design of advanced heterogeneous catalytic systems with controllable radical reactions.

Key words: Metal-radical interaction, Radical reaction, Photocatalysis, Catalytic mechanism, Metal catalysis