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250829s2025 xx |||||o 00| ||eng c |
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|a 10.1002/adma.202507549
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|a eng
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| 100 |
1 |
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|a Li, Xueli
|e verfasserin
|4 aut
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|a Pyrolysis-Free Covalent Organic Polymer Efficiently Driving Proton-Exchange-Membrane Fuel Cells by Covalent Grafting Strategy
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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 PubMed-not-MEDLINE
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|a © 2025 Wiley‐VCH GmbH.
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|a Covalent organic polymers (COPs) have emerged as promising oxygen reduction reaction (ORR) catalysts due to their structural tunability and well-defined active sites. However, their practical application is hindered by inherent electrical conductivity and restricted active site accessibility in bulk configurations. While van der Waals-assembled COP-carbon composites enhance conductivity, persistent stacking, and weak interfaces still impede electron/mass transport during ORR. Herein, a covalent grafting strategy is proposed to fabricate a lamellar COP network COPG, which is achieved by edge-functionalizing COP with aromatic primary amine groups, followed by diazotization reactions and covalent attachment of graphene dispersions. The resulting hybrid exhibits significantly improved active site accessibility and a tenfold increase in conductivity compared to pristine COP. As a result, in 0.1 M HClO4, COP@G delivers an exceptional acidic ORR performance, with a record half-wave potential of 801 mV, surpassing van der Waals-assembled COP-G by 194 mV. When integrated into proton-exchange-membrane fuel cell (PEMFC) cathodes, COP@G demonstrates an order-of-magnitude enhancement in maximum power density compared to conventional COP-carbon composites
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|a Journal Article
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|a covalent grafting strategy
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|a covalent organic polymer
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|a proton exchange membrane fuel cells
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|a pyrolysis‐free preparation
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|a Hou, Jingkui
|e verfasserin
|4 aut
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|a Leng, Yiming
|e verfasserin
|4 aut
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|a Liu, Shizhen
|e verfasserin
|4 aut
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| 700 |
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|a Xiang, Zhonghua
|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 37(2025), 34 vom: 02. Aug., Seite e2507549
|w (DE-627)NLM098206397
|x 1521-4095
|7 nnas
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| 773 |
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|g volume:37
|g year:2025
|g number:34
|g day:02
|g month:08
|g pages:e2507549
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|u http://dx.doi.org/10.1002/adma.202507549
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