Volume 136, Issue 23 e202404563
Forschungsartikel

Pyridine-Based Covalent Organic Frameworks with Pyridyl-Imine Structures for Boosting Photocatalytic H2O2 Production via One-Step 2e Oxygen Reduction

Weijian Wu

Weijian Wu

Hebei Key Laboratory of Inorganic Nano-materials, College of Chemistry and Materials Science, Hebei Normal University, Shijiazhuang, 050024 Hebei, China

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Zixuan Li

Zixuan Li

Hebei Key Laboratory of Inorganic Nano-materials, College of Chemistry and Materials Science, Hebei Normal University, Shijiazhuang, 050024 Hebei, China

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Shiyin Liu

Shiyin Liu

Hebei Key Laboratory of Inorganic Nano-materials, College of Chemistry and Materials Science, Hebei Normal University, Shijiazhuang, 050024 Hebei, China

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Di Zhang

Di Zhang

Hebei Key Laboratory of Inorganic Nano-materials, College of Chemistry and Materials Science, Hebei Normal University, Shijiazhuang, 050024 Hebei, China

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Bingzi Cai

Bingzi Cai

Hebei Key Laboratory of Inorganic Nano-materials, College of Chemistry and Materials Science, Hebei Normal University, Shijiazhuang, 050024 Hebei, China

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Yizhao Liang

Yizhao Liang

Hebei Key Laboratory of Inorganic Nano-materials, College of Chemistry and Materials Science, Hebei Normal University, Shijiazhuang, 050024 Hebei, China

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Prof. Dr. Mingxing Wu

Prof. Dr. Mingxing Wu

Hebei Key Laboratory of Inorganic Nano-materials, College of Chemistry and Materials Science, Hebei Normal University, Shijiazhuang, 050024 Hebei, China

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Prof. Dr. Yaozu Liao

Prof. Dr. Yaozu Liao

State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai, 201620 China

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Prof. Dr. Xiaojia Zhao

Corresponding Author

Prof. Dr. Xiaojia Zhao

Hebei Key Laboratory of Inorganic Nano-materials, College of Chemistry and Materials Science, Hebei Normal University, Shijiazhuang, 050024 Hebei, China

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First published: 02 April 2024
Citations: 3

Abstract

Bipyridine-based covalent organic frameworks (COFs) have emerged as promising contenders for the photocatalytic generation of hydrogen peroxide (H2O2). However, the presence of imine nitrogen alters the mode of H2O2 generation from an efficient one-step two-electron (2e) route to a two-step 2e oxygen reduction pathway. In this work, we introduce 3,3′-bipyridine units into imine-based COF skeletons, creating a pyridyl-imine structure with two adjacent nitrogen atoms between the pyridine ring and imine linkage. This unique bipyridine-like architecture can effectively suppress the two-step 2e ORR process at the single imine-nitrogen site, facilitating a more efficient one-step 2e pathway. Consequently, the optimized pyridyl-imine COF (PyIm-COF) exhibits a remarkable H2O2 production rate of up to 5850 μmol h−1 g−1, nearly double that of pristine bipyridine COFs. This work provides valuable insight into the rational design of functionalized COFs for enhanced H2O2 production in photocatalysis.

Conflict of interests

The authors have no conflicts of interest to declare.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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