文献类型：期刊文献

英文题名：One-Dimensional Covalent Organic Frameworks for the 2e- Oxygen Reduction Reaction

作者：An, Shuhao[1];Li, Xuewen[2,3,4];Shang, Shuaishuai[1];Xu, Ting[1];Yang, Shuai[2,3];Cui, Cheng-Xing[5];Peng, Changjun[1];Liu, Honglai[1];Xu, Qing[2,3];Jiang, Zheng[2,3,4];Hu, Jun[1]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China;[2]Chinese Acad Sci, CAS Key Lab Low Carbon Convers Sci & Engn, Shanghai Adv Res Inst SARI, Shanghai 201210, Peoples R China;[3]Univ Chinese Acad Sci, Sch Chem Engn, Beijing 100049, Peoples R China;[4]Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201210, Peoples R China;[5]Henan Inst Sci & Technol, Sch Chem & Chem Engn, Xinxiang 453003, Peoples R China

年份：2023

卷号：62

期号：14

外文期刊名：ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

收录：;EI(收录号：20230813629377);WOS:【SCI-EXPANDED(收录号:WOS:000957482800001)】；

基金：This work was supported by the National Natural Science Foundation of China (Nos. 21878076 and 22008064) and the Science and Technology Commission of Shanghai Municipality (No. 19160712100). S.A. acknowledges financial support from the China Postdoctoral Science Foundation (No. 2019M661408). Q.X. acknowledges financial support from the Natural Science Foundation of Shanghai (20ZR1464000).

语种：英文

外文关键词：Covalent Organic Frameworks; Edge Sites; Metal-Free Catalysts; One Dimensional Topology; Oxygen Reduction Reaction

摘要：Two-dimensional covalent organic frameworks (2D COFs) are often employed for electrocatalytic systems because of their structural diversity. However, the efficiency of atom utilization is still in need of improvement, because the catalytic centers are located in the basal layers and it is difficult for the electrolytes to access them. Herein, we demonstrate the use of 1D COFs for the 2e(-) oxygen reduction reaction (ORR). The use of different four-connectivity blocks resulted in the prepared 1D COFs displaying good crystallinity, high surface areas, and excellent chemical stability. The more exposed catalytic sites resulted in the 1D COFs showing large electrochemically active surface areas, 4.8-fold of that of a control 2D COF, and thus enabled catalysis of the ORR with a higher H2O2 selectivity of 85.8% and activity, with a TOF value of 0.051 s(-1) at 0.2 V, than a 2D COF (72.9% and 0.032 s(-1)). This work paves the way for the development of COFs with low dimensions for electrocatalysis.