Solar‐to‐H <sub>2</sub>O <sub>2</sub> Catalyzed by Covalent Organic Frameworks

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Abstract

Benefiting from the excellent structural tunability, robust framework, ultrahigh porosity, and rich active sites, covalent organic frameworks (COFs) are widely recognized as promising photocatalysts in chemical conversions, and emerged in the hydrogen peroxide (H ₂O ₂) photosynthesis in 2020. H ₂O ₂, serving as an environmental‐friendly oxidant and a promising liquid fuel, has attracted increasing researchers to explore its potential. Over the past few years, numerous COFs‐based photocatalysts are developed with encouraging achievements in H ₂O ₂ production, whereas no comprehensive review articles exist to summarize this specific and significant area. Herein we provide a systematic overview of the advances and challenges of COFs in photocatalytic H ₂O ₂ production. We first introduce the priorities of COFs in H ₂O ₂ photosynthesis. Then, various strategies to improve COFs photocatalytic efficiency are discussed. The perspective and outlook for future advances of COFs in this emerging field are finally offered. This timely review will pave the way for the development of highly efficient COFs photocatalysts for practical production of value‐added chemicals not limited to H ₂O ₂.

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Semiconductor-based photocatalysis attracts wide attention because of its ability to directly utilize solar energy for production of solar fuels, such as hydrogen and hydrocarbon fuels and for degradation of various pollutants. However, the efficiency of photocatalytic reactions remains low due to the fast electron-hole recombination and low light utilization. Therefore, enormous efforts have been undertaken to solve these problems. Particularly, properly engineered heterojunction photocatalysts are shown to be able to possess higher photocatalytic activity because of spatial separation of photogenerated electron-hole pairs. Here, the basic principles of various heterojunction photocatalysts are systematically discussed. Recent efforts toward the development of heterojunction photocatalysts for various photocatalytic applications are also presented and appraised. Finally, a brief summary and perspectives on the challenges and future directions in the area of heterojunction photocatalysts are also provided.

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Author and article information

Contributors

Zijun Yong: (View ORCID Profile)

Tianyi Ma: (View ORCID Profile)

Journal

Title: Angewandte Chemie International Edition

Abbreviated Title: Angew Chem Int Ed

Publisher: Wiley

ISSN (Print): 1433-7851

ISSN (Electronic): 1521-3773

Publication date Created: December 04 2023

Publication date (Electronic): August 25 2023

Publication date (Print): December 04 2023

Volume: 62

Issue: 49

Affiliations

[1 ] School of Science RMIT University Melbourne, VIC 3000 Australia

Article

DOI: 10.1002/anie.202308980

SO-VID: f759ec58-9364-484e-80dd-075f1f9a5729

License:

http://creativecommons.org/licenses/by-nc/4.0/

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