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250903s2025 xx |||||o 00| ||eng c |
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|a 10.1002/adma.202510193
|2 doi
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|a eng
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| 100 |
1 |
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|a Hu, Haijun
|e verfasserin
|4 aut
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| 245 |
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|a Anchoring Redox Mediator on COFs for Efficient Solar to Hydrogen Conversion
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|c 2025
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|a Text
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|a ƒaComputermedien
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|a ƒa Online-Ressource
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|a Date Revised 28.08.2025
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|a published: Print-Electronic
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|a Citation Status Publisher
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|a © 2025 The Author(s). Advanced Materials published by Wiley‐VCH GmbH.
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|a To address severe carrier recombination in Z-scheme heterojunctions, redox mediators such as IO3 -/I- or Fe3⁺/Fe2⁺ are often introduced, yet their dispersion in solution causes instability, low electron transport efficiency and side reactions. Herein, an innovative Fe-coordinated 2D Z-scheme heterojunction composed of TpPa-1-COF (TP1C) and Bi2WO6 (BWO) is developed for efficient photocatalytic H2 production. Unlike traditional indirect Z-scheme heterojunctions, the Fe3+/Fe2+ mediator is firmly anchored on the skeleton of COFs, thus enhancing recyclability, charge migration and long-lasting stability, which is supported by extended X-ray absorption fine structure (EXAFS) and a range of electrochemical tests. In addition, the formation of 2D Z-scheme heterojunctions not only retains high redox properties but also provides abundant active sites for photocatalytic reactions. Consequently, the photocatalytic H2 production rate of 25% BWO/Fe/TP1C reaches up to 6.31 mmol·g-1·h-1 without the addition of co-catalysts, being about 28.68 times as high as that of pure COFs and 2.3 folds over that of 25% BWO/TP1C, exceeding a host of COF-based photocatalysts. The findings of this research highlight the potential of novel indirect Z-scheme heterojunctions for advanced photocatalytic applications, offering a new pathway to overcome the limitations of traditional COF-based systems in hydrogen production
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|a Journal Article
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|a covalent organic frameworks
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|a photocatalysis
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|a redox mediator
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|a Sun, Xiaodong
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Ma, Yali
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Li, Hui
|e verfasserin
|4 aut
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|a Zhang, Wei
|e verfasserin
|4 aut
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|a Fan, Hua
|e verfasserin
|4 aut
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|a Huang, Hongwei
|e verfasserin
|4 aut
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| 700 |
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|a Ma, Tianyi
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Advanced materials (Deerfield Beach, Fla.)
|d 1998
|g (2025) vom: 27. Aug., Seite e10193
|w (DE-627)NLM098206397
|x 1521-4095
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|g year:2025
|g day:27
|g month:08
|g pages:e10193
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|u http://dx.doi.org/10.1002/adma.202510193
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