Designs of Tandem Catalysts and Cascade Catalytic Systems for CO2 Upgrading

Upgrading CO2 into multi‐carbon (C2+) compounds through the CO2 reduction reaction (CO2RR) offers a practical approach to mitigate atmospheric CO2 while simultaneously producing high value chemicals. The reaction pathways for C2+ production involve multi‐step proton‐coupled electron transfer (PCET)...

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Bibliographic Details
Published in:Angewandte Chemie International Edition 2023-10, Vol.62 (43), p.e202307283-e202307283
Main Authors: Zheng, Wanzhen, Yang, Xiaoxuan, Li, Zhongjian, Yang, Bin, Zhang, Qinghua, Lecheng Lei, Hou, Yang
Format: Article
Language:English
Subjects:
Carbon dioxide
Catalysis
Catalysts
Chemical reduction
Coupling
Electron transfer
Intermediates
Protons
Reaction kinetics
Upgrading
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Summary:Upgrading CO2 into multi‐carbon (C2+) compounds through the CO2 reduction reaction (CO2RR) offers a practical approach to mitigate atmospheric CO2 while simultaneously producing high value chemicals. The reaction pathways for C2+ production involve multi‐step proton‐coupled electron transfer (PCET) and C−C coupling processes. By increasing the surface coverage of adsorbed protons (*Had) and *CO intermediates, the reaction kinetics of PCET and C−C coupling can be accelerated, thereby promoting C2+ production. However, *Had and *CO are competitively adsorbed intermediates on monocomponent catalysts, making it difficult to break the linear scaling relationship between the adsorption energies of the *Had/*CO intermediate. Recently, tandem catalysts consisting of multicomponents have been developed to improve the surface coverage of *Had or *CO by enhancing water dissociation or CO2‐to‐CO production on auxiliary sites. In this context, we provide a comprehensive overview of the design principles of tandem catalysts based on reaction pathways for C2+ products. Moreover, the development of cascade CO2RR catalytic systems that integrate CO2RR with downstream catalysis has expanded the range of potential CO2 upgrading products. Therefore, we also discuss recent advancements in cascade CO2RR catalytic systems, highlighting the challenges and perspectives in these systems.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.202307283