文献类型：期刊文献

英文题名：Tuning Linkage and Dimensionality in Covalent Organic Frameworks for Enhanced Photocatalytic Hydrogen Peroxide Production

作者：Liao, Yingling[1,2];Wang, Zitong[1];Deng, Chenghua[1];Zhou, Zhibei[1];Shi, Li[2];Lin, Wenbin[1]

机构：[1]Univ Chicago, Dept Chem, Chicago, IL 60637 USA;[2]East China Univ Sci & Technol, Int Joint Res Ctr Green Energy Chem Engn, Shanghai 200237, Peoples R China

年份：2025

卷号：15

期号：12

起止页码：10144

外文期刊名：ACS CATALYSIS

收录：;EI(收录号：20252218537016);WOS:【SCI-EXPANDED(收录号:WOS:001500033400001)】；

基金：This work was supported by the University of Chicago. We thank Prof. Anna Wuttig and Mr. Gregory Gorobets for help with EIS and photocurrent measurements.

语种：英文

外文关键词：three-dimensional; covalent organic frameworks; photocatalytic hydrogen peroxide production; methylated; solar energy conversion

摘要：We report the synthesis of two-dimensional (2D) and three-dimensional (3D) covalent organic frameworks (COFs) for photocatalytic hydrogen peroxide (H2O2) production. Pyrene-based 2D COF (1) and 3D COF (2) were synthesized to investigate the effect of COF dimensionality on photocatalytic performance. By treating them with trimethyloxonium tetrafluoroborate, the imine bonds in the COFs were methylated, yielding 2D and 3D pyrene-based iminium-linked COFs 3 and 4, respectively. These COFs exhibited strong and broad visible-light absorption, significantly enhancing photocatalytic efficiency. The methylated 3D COF (4) achieved a high H2O2 production rate of 1839 mu molg-1h-1 and maintained its performance over multiple cycles. This work introduces a strategy for optimizing COF photocatalytic performance and highlights the potential of 3D COFs in solar energy conversion applications.