Covalent organic framework-derived fluorine, nitrogen dual-doped carbon as metal-free bifunctional oxygen electrocatalysts

Li, Wei; Wang, Jingyun; Jia, Chunguang; Chen, Junxiang; Wen, Zhenhai; Huang, Aisheng

doi:10.1016/j.jcis.2023.06.210

Cited by 25 publications

(6 citation statements)

References 60 publications

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“…The structural tunability allows for the synthesis of COF materials with diverse properties by pre‐design and postsynthetic modification (PSM) [14] . In particular, the PSM strategies such as doping, [15] physical adsorption, [16] and post‐metalation, [17] endow the aiming functions of COFs through the assembly of specific groups with side‐chain groups, backbones, and reactive bonds [18] . Moreover, the PSM strategy based on interactions or chemical reactions possesses the advantages of universality and greater ease of modification.…”

Section: Figurementioning

confidence: 99%

Bimodal Oxidation Electrochemiluminescence Mechanism of Coreactant‐Embedded Covalent Organic Frameworks via Postsynthetic Modification

Meng,

Zheng,

Luo

et al. 2024

Angew Chem Int Ed

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Electrochemiluminescence (ECL) efficiency is determined by charge transfer between coreactants and emitters in coreactant systems, which are usually limited by their slow intermolecular charge transfer. In this study, a covalent organic framework (COF) with aldehyde residue was synthesized, and then coreactants were covalently integrated into the skeleton through the post‐synthetic modification strategy, resulting in a crystalline coreactant‐embedded COF nanoemitter (C‐COF). Compared to the pristine COF with an equivalent external coreactant, C‐COF exhibited an extraordinary 1008‐fold enhancement of ECL intensity due to the rapid intrareticular charge transfer. Significantly, with the pH increase, C‐COF shows protonation‐induced ECL enhancement for the first ECL peaked at +1.1 V and an opposite trend for the second ECL at +1.4 V, which were attributed to the antedating oxidation of coreactant in framework and COF self‐oxidation, respectively. The resulting bimodal oxidation ECL mechanism was rationalized by spectral characterization and density functional theory calculations. The postsynthetic coreactant‐embedded nanoemitters present innovative and universal avenues for advancing ECL systems.

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Section: Figurementioning

confidence: 99%

Bimodal Oxidation Electrochemiluminescence Mechanism of Coreactant‐Embedded Covalent Organic Frameworks via Postsynthetic Modification

Meng,

Zheng,

Luo

et al. 2024

Angew Chem Int Ed

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“…Li et al. [ 136 ] developed a porous carbon (F–NPC) catalyst codoped with fluorine and nitrogen by the direct pyrolysis of F– and N–containing covalent organic skeletons (Figure 17g). The introduction of fluorine is beneficial for the formation of edge defects, thus contributing to an improvement in the electrocatalytic activity.…”

Section: Application Of Cof‐correlated Materials In Zabsmentioning

confidence: 99%

Engineering Covalent Organic Frameworks Toward Advanced Zinc‐Based Batteries

Zhang,

Zhi,

Zhang

et al. 2024

Advanced Materials

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Zinc–based batteries (ZBBs) have demonstrated considerable potential among secondary batteries, attributing to their advantages including good safety, environmental friendliness, and high energy density. However, ZBBs still suffer from issues such as the formation of zinc dendrites, occurrence of side reactions, retardation of reaction kinetics, and shuttle effects, posing a great challenge for practical applications. As promising porous materials, covalent organic frameworks (COFs) and their derivatives have rigid skeletons, ordered structures, and permanent porosity, which endow them with great potential for application in ZBBs. This review, therefore, provides a systematic overview detailing on COFs structure pertaining to electrochemical performance of ZBBs, following an in–depth discussion of the challenges faced by ZBBs, which includes dendrites and side reactions at the anode, as well as dissolution, structural change, slow kinetics and shuttle effect at the cathode. Then, the structural advantages of COF–correlated materials and their roles in various ZBBs are highlighted. Finally, the challenges in the application of COF–correlated materials in ZBBs are outlined and an outlook on the future development of COF–correlated materials for using in ZBBs is provided. The review would serve as a valuable reference for further research into the utilization of COF–correlated materials in ZBBs.This article is protected by copyright. All rights reserved

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“…14 An effective strategy to enhance their electrocatalytic properties is doping with nitrogen. 20 While N-doped carbons were tested in alkaline Zn–air cells, 21–24 the effects of doping on the performance in non-alkaline ZABs have remained unexplored.…”

Section: Introductionmentioning

confidence: 99%

Nitrogen-doped hierarchically porous carbons for non-alkaline Zn–air battery cathodes

Kapaev,

Shahaf,

Sonoo

et al. 2024

Energy Adv.

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Covalent organic framework-derived fluorine, nitrogen dual-doped carbon as metal-free bifunctional oxygen electrocatalysts

Cited by 25 publications

References 60 publications

Bimodal Oxidation Electrochemiluminescence Mechanism of Coreactant‐Embedded Covalent Organic Frameworks via Postsynthetic Modification

Bimodal Oxidation Electrochemiluminescence Mechanism of Coreactant‐Embedded Covalent Organic Frameworks via Postsynthetic Modification

Engineering Covalent Organic Frameworks Toward Advanced Zinc‐Based Batteries

Nitrogen-doped hierarchically porous carbons for non-alkaline Zn–air battery cathodes

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