Revealing the structure–activity relationship in woven covalent organic frameworks for the electrocatalytic oxygen reduction reaction. Issue 16 (7th April 2022)

• Record Type: Journal Article
• Authors: Li, Jiawen; Liu, Peng; Mao, Jianxin; Yan, Jianyue; Song, Wenbo
• Is Part Of: Nanoscale. Volume 14:Issue 16(2022)
• Page Start: 6126
• Page End: 6132
• Publication Date: 2022-04-07
• Subjects: Nanoscience -- Periodicals; Nanotechnology -- Periodicals; 620.505
• DOI: 10.1039/d2nr00791f
• Languages: English
• ISSNs: 2040-3364

Abstract

Abstract : A woven COF is developed as an electrocatalyst for the ORR to reveal the role of the metal center and linkage. Abstract : 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 ( E onset = 0.87 V vs. RHE, n = 3.86, and J L = 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.