Chinese Journal of Catalysis ›› 2020, Vol. 41 ›› Issue (2): 357-363.DOI: 10.1016/S1872-2067(19)63449-2

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Photocatalytic C-X borylation of aryl halides by hierarchical SiC nanowire-supported Pd nanoparticles

Zhi-Feng Jiaoa,d, Ji-Xiao Zhaoa,d, Xiao-Ning Guob, Xiang-Yun Guoa,c,d   

  1. a State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, Shanxi, China;
    b Institut für Anorganische Chemie, and Institute for Sustainable Chemistry & Catalysis with Boron, Julius-Maximilians-Universität Würzburg, Am Hubland, 97074 Würzburg, Germany;
    c School of Petrochemical Engineering, Changzhou University, Changzhou 213164, Jiangsu, China;
    d Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2019-05-17 Revised:2019-07-10 Online:2020-02-18 Published:2019-11-04
  • Supported by:
    This work was supported by the National Natural Science Foudation of China (21473232, 21673271, U1710112).

Abstract: Hierarchical SiC nanowire-supported Pd nanoparticles showed high photocatalytic activity for the C-X (X=Br, I) borylation of aryl halides at 30℃. The SiC/Pd Mott-Schottky contact enhances the rapid transfer of the photogenerated electrons from SiC to the Pd nanoparticles. As a result, the concentrated energetic electrons in the Pd nanoparticles can facilitate the cleavage of C-I or C-Br bonds, which normally requires high-temperature thermal processes. We show that the present Pd/SiC photocatalyst is capable of catalyzing the transformation of a large variety of aryl halides to their corresponding boronate esters under visible light irradiation, with excellent yields.

Key words: Boronate esters, Carbon-halogen activation, Hierarchical SiC nanowires, Pd nanoparticles, Photocatalysis