亚胺
共价键
催化作用
氧还原
金属
材料科学
共价有机骨架
电催化剂
化学工程
联动装置(软件)
活动中心
化学
纳米技术
有机化学
电极
电化学
物理化学
冶金
工程类
基因
生物化学
作者
Jiawen Li,Peng Liu,Jianxin Mao,Jianyue Yan,Wenbo Song
出处
期刊:Nanoscale
[The Royal Society of Chemistry]
日期:2022-01-01
卷期号:14 (16): 6126-6132
被引量:11
摘要
Woven covalent organic frameworks (COFs) possess three-dimensional (3D) frameworks with well-dispersed variable metal centers, showing great promise in heterogeneous catalysis. Until now, woven COFs have not been exploited as catalysts. Herein, COF-112 (a typical woven COF) is utilized as an ORR catalyst to reveal the role of the metal center and linkage. Through metal center variation, the optimal COF-112Co with imine linkage exhibits superior ORR activity (Eonset = 0.87 V vs. RHE, n = 3.86, and JL = 5.78 mA cm-2). Experimental and theoretical studies demonstrate the non-metallic ORR active site and confirm the influence of metal variation in COF-112. A linkage conversion strategy reveals the importance of the imine linkage on the 4e- ORR. This work reveals the structure-activity relationship of woven COFs, which will broaden the application of COFs and extend the diversity of electrocatalysts.
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