Chinese Journal of Catalysis ›› 2022, Vol. 43 ›› Issue (9): 2425-2433.DOI: 10.1016/S1872-2067(22)64143-3

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"All-in-one" covalent organic framework for photocatalytic CO2 reduction

Dengmeng Songa,, Wenhua Xua,, Jun Lia,*(), Jiale Zhaoa, Qing Shia, Fei Lib,#(), Xuzhuo Sunc, Ning Wanga,b,$()   

  1. aKey Laboratory of Synthetic and Natural Functional Molecule of the Ministry of Education, College of Chemistry & Materials Science, Northwest University, Xi’an 710069, Shaanxi, China
    bState Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116024, Liaoning, China
    cCollege of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou 450001, Henan, China
  • Received:2022-04-19 Accepted:2022-06-17 Online:2022-09-18 Published:2022-07-20
  • Contact: Jun Li, Fei Li, Ning Wang
  • About author:First author contact:

    †Contributed equally to this work.

  • Supported by:
    National Natural Science Foundation of China(21773184);National Natural Science Foundation of China(22172018);National Natural Science Foundation of China(21671158);State Key Laboratory of Fine Chemicals, Dalian University of Technology(KF2110);Natural Science Foundation of Henan Province(212300410339)

Abstract:

Constructed by selecting appropriate building blocks, covalent organic frameworks (COFs) can be endowed with a variety of specific functions. Herein, we successfully synthesized an imine-linked H2PReBpy-COF with the CO2 reduction catalyst [ReI(bpy)(CO)3Cl] and the porphyrin photosensitizer as the monomeric building units. The light-harvesting properties of the porphyrin itself, augmented by the extended π-conjugated planar structure of 2D COF, enable H2PReBpy-COF the excellent light-harvesting capability, efficient charge separation, and fast interfacial charge transfer. In addition, a large amount of uniformly distributed [ReI(bpy)(CO)3Cl] units offer H2PReBpy-COF an excellent activity toward photocatalytic CO2 reduction with moderate selectivity and reusability. This study demonstrated a proof of concept in which the advantages of COFs and functional monomers are rationally integrated for photocatalytic solar fuel conversion.

Key words: Covalent organic framework, CO2 photoreduction, Porphyrin, Re complex, Visible-light