非金属三维共价有机框架在高效氧还原中的应用:一种新颖的方法
Efficient oxygen reduction through metal-free 3D covalent organic frameworks:a novel approach
韦闪跃 1吴晓伟 2朱书飞 1王之杨 3王江丽 2卢灿忠 3谢奕明4
作者信息
- 1. Engineering Research Center of Environment-Friendly Function Materials,Ministry of Education,College of Materials Science & Engineering,Huaqiao University,Xiamen 361021,China;CAS Key Laboratory of Design and Assembly of Functional Nanostructures,Fujian Provincial Key Laboratory of Nanomaterials,State Key Laboratory of Structural Chemistry,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou 350002,China;Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materi
- 2. CAS Key Laboratory of Design and Assembly of Functional Nanostructures,Fujian Provincial Key Laboratory of Nanomaterials,State Key Laboratory of Structural Chemistry,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou 350002,China;Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials,Xiamen Institute of Rare Earth Materials,Haixi Institutes,Chinese Academy of Sciences,Xiamen 361021,China
- 3. CAS Key Laboratory of Design and Assembly of Functional Nanostructures,Fujian Provincial Key Laboratory of Nanomaterials,State Key Laboratory of Structural Chemistry,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou 350002,China;Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials,Xiamen Institute of Rare Earth Materials,Haixi Institutes,Chinese Academy of Sciences,Xiamen 361021,China;University of Chinese Academy of Sciences,Beijing 100049,China
- 4. Engineering Research Center of Environment-Friendly Function Materials,Ministry of Education,College of Materials Science & Engineering,Huaqiao University,Xiamen 361021,China;CAS Key Laboratory of Design and Assembly of Functional Nanostructures,Fujian Provincial Key Laboratory of Nanomaterials,State Key Laboratory of Structural Chemistry,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou 350002,China
- 折叠
摘要
共价有机框架材料因其结构多样性和可调节的功能而在电催化系统中获得了显著的应用.此外,三维(3D)共价有机框架(COFs)展现出多级孔隙结构,暴露出众多活性位点,这有助于推进氧气还原反应(ORR)的进程.然而,3D COFs在ORR方面的进展受到了限制,这些限制包括有限的拓扑结构、缺乏具有所需反应性和对称性的构建单元,以及确定晶体结构的困难.在本研究中,我们利用一种8连接性的构建单元,成功构建了两种等网状的3D COF材料,这些材料在无需添加任何金属或导电支撑材料,也无需热解过程的情况下,展现出了对2电子氧气还原反应异常高的催化活性.两种3D COF的电化学活性表面积(ECSAs)分别为17.19和12.18 mF/cm2,显著高于其他框架材料所报告的数据.
Abstract
Covalent organic framework(COF)materials have gained significant applications in electrocatalytic systems due to their structural diversity and tunable functionalities.Moreover,three-dimensional(3D)COFs exhibit multistage pore structures,exposing numerous open sites,which facil-itate the oxygen reduction reaction(ORR)process.However,the advancement of 3D COFs for ORR has been hindered by challenges,including limited topologies,the scarcity of building blocks with the required reactivity and symmetries,and difficulties in determining crystalline structures.In this work,we utilized an 8-connectivity building unit and suc-cessfully constructed two isoreticular 3D COF materials,which exhibited exceptionally high catalytic activity for 2e-oxygen reduction reaction without the addition of any metal or conductive support materials,nor the pyrolyzed process.The electrochemically active surface areas(ECSAs)of the two 3D COFs were found to be 17.19 and 12.18 mF/cm2,respec-tively,which were significantly higher than those reported from other framework materials.
关键词
electrocatalysis/oxygen reduction reaction/metal-free/covalent organic frameworkKey words
electrocatalysis/oxygen reduction reaction/metal-free/covalent organic framework引用本文复制引用
出版年
2024
NETL
NSTL
万方数据