Boosting Electroreduction of CO2 over Cationic Covalent Organic Frameworks: Hydrogen Bonding Effects of Halogen Ions

We present the first example of charged imidazolium functionalized porphyrin‐based covalent organic framework (Co‐iBFBim‐COF‐X) for electrocatalytic CO2 reduction reaction, where the free anions (e.g., F−, Cl−, Br−, and I−) of imidazolium ions nearby the active Co sites can stabilize the key interme...

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Bibliographic Details
Published in:Angewandte Chemie International Edition 2023-02, Vol.62 (7), p.e202215687-n/a
Main Authors: Wu, Qiu‐Jin, Si, Duan‐Hui, Wu, Qiao, Dong, Yu‐Liang, Cao, Rong, Huang, Yuan‐Biao
Format: Article
Language:English
Subjects:
Anions
Carbon dioxide
Chemical reduction
CO2 Electrocatalysis
Covalent Organic Framework
Electrodes
Hydrogen Bond
Hydrogen bonding
Hydrogen evolution reactions
Imidazolium
Intermediates
Ions
Porphyrins
Selectivity
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Summary:We present the first example of charged imidazolium functionalized porphyrin‐based covalent organic framework (Co‐iBFBim‐COF‐X) for electrocatalytic CO2 reduction reaction, where the free anions (e.g., F−, Cl−, Br−, and I−) of imidazolium ions nearby the active Co sites can stabilize the key intermediate *COOH and inhibit hydrogen evolution reaction. Thus, Co‐iBFBim‐COF‐X exhibits higher activity than the neutral Co‐BFBim‐COF, following the trend of F−
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.202215687