Title : Unblocked intramolecular charge transfer for enhanced CO2 photoreduction enabled by an imidazolium-based ionic conjugated microporous polymer

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Title of Paper:Unblocked intramolecular charge transfer for enhanced CO2 photoreduction enabled by an imidazolium-based ionic conjugated microporous polymer

Journal:Applied Catalysis B: Environmental

Place of Publication:Elsevier

Abstract:Efficient solar energy-driven conversion of CO2 to valuable chemicals is challenging. Here we design an imidazolium-based ionic conjugated microporous polymer (ImI-CMP), which unblocks readily intramolecular charge transfer and triggers CO2 photoreduction. Under visible light irradiation, ImI-CMP incorporated with Co (II) species exhibits a high CO production rate of 2953 μmol g−1 h−1 and a turnover frequency of 30.8 h−1; these numbers are competitive to that of the best porous organic polymers. The mechanism studies reveal that two factors play key roles in the outstanding photocatalytic performance. First, the imidazolium motifs on the ImI-CMP enhance the activation of CO2. Second, π-conjugation structure and the built-in electric field allow ultrafast intramolecular photoinduced electron transfer in the ImI-CMP. This work provides a new strategy for designing high-performance organic photocatalysts for CO2 reduction by combining cationic imidazolium motifs and π-conjugation structures.

All the Authors:Dong Zhai,Daoyuan Zheng,Hao Wu,Lei Sun,Zhen Li,Tie Yu,Wei Zhou,Xu Fang,Shengliang Zhai,Keli Han,Zuoli He,Weiqiao Deng

First Author:Weiling Zhao

Indexed by:Journal paper

Correspondence Author:Chengcheng Liu

Discipline:Engineering

First-Level Discipline:Environmental Science and Engineering

Document Type:J

Volume:300

Page Number:120719

Translation or Not:no

Date of Publication:2022-03-01

Included Journals:SCI