Porphyrin and phthalocyanine based covalent organic frameworks for electrocatalysis

Covalent organic frameworks (COFs) area burgeoning class of crystalline porous polymers. Owing to their unique features including tunable porosity, abundant accessible active sites, synthetically controllability, and pre-designed topological structures, COFs have been widely employed in various fields including catalysis, energy storage and conversion, gas adsorption, and optoelectronics. The incorporation of porphyrin (Por-) and phthalocyanine (Pc-) building units into COFs endows COFs with unique structural characteristics, excellent optical and electrical properties. Recent years have witnessed significant pro-gress in reasonable design and construction of Por-and Pc-based COFs for electrocatalytic water splitting, CO2 reduction, and oxygen reduction. Herein, the synthetic strategies of Por-and Pc-based COFs are first summarized, which includes the rational design of building units and linkers, and the reaction types used in constructing Por-and Pc-based COFs. A systematic overview of the application of Por-and Pc-based COFs in the electrocatalytic reactions including CO2 reduction reaction (CO2RR), hydrogen evolution reaction (HER), oxygen evolution reaction (OER), and oxygen reduction reaction (ORR) are then performed. Lastly, the current challenges and directions to tailor Por-and Pc-based COFs for efficient and stable elec-trocatalysis are presented. (C)& nbsp;2022 Elsevier B.V. All rights reserved.

Automated summary

Covalent organic frameworks (COFs) are a rapidly growing class of crystalline porous polymers that have a wide range of applications due to their unique features. By incorporating porphyrin (Por-) and phthalocyanine (Pc-) building units into COFs, they acquire unique structural characteristics and excellent optical and electrical properties. Recent progress has been made in the rational design and construction of Por- and Pc-based COFs for electrocatalytic water splitting, CO2 reduction, and oxygen reduction. This article provides a summary of the synthetic strategies of Por- and Pc-based COFs, an overview of their applications in electrocatalytic reactions, and discusses the current challenges and directions for further development.