文献类型：期刊文献

英文题名：Redox-enhanced photocatalysis: Boosting hydrogen peroxide production in conjugated triazine frameworks with dihydrophenazine cycling

作者：Zhang, Jiayi[1,2];Tian, Limei[3,4];Feng, Shufan[1,2];Wang, Zhiqiang[5,6];Yu, Weifeng[7];Hu, Ke[3,4];Hua, Jianli[1,2]

机构：[1]East China Univ Sci & Technol, Key Lab Adv Mat, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Feringa Nobel Prize Scientist Joint Res Ctr, Frontiers Sci Ctr Materiobiol & Dynam Chem, Sch Chem & Mol Engn,Joint Int Res Lab Precis Chem, 130 Meilong Rd, Shanghai 200237, Peoples R China;[3]Fudan Univ, Dept Chem, 220 Handan Rd, Shanghai 200433, Peoples R China;[4]Fudan Univ, Shanghai Key Lab Mol Catalysis & Innovat Mat, 220 Handan Rd, Shanghai 200433, Peoples R China;[5]East China Univ Sci & Technol, Ctr Computat Chem, State Key Lab Green Chem Engn & Ind Catalysis, 130 Meilong Rd, Shanghai 200237, Peoples R China;[6]East China Univ Sci & Technol, Res Inst Ind Catalysis, Sch Chem & Mol Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[7]East China Univ Sci & Technol, State Key Lab Chem Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2025

卷号：506

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20250517792060);WOS:【SCI-EXPANDED(收录号:WOS:001417086200001)】；

基金：For financial support of this research, the authors thank the projects supported by the National Natural Science Foundation of China (22271093, 21971064, and 22173022) , Shanghai Municipal Science and Technology Major Project (2018SHZDZX03) , the Fundamental Research Funds for the Central Universities (222201717003 and 50321101918001) and the Programme of Introducing Talents of Discipline to Universities (B16017) . The authors thank Research Center of Analysis and Test of East China University of Science and Technology for the help on the characterization.

语种：英文

外文关键词：Conjugated triazine frameworks; Artificial photosynthesis; Hydrogen peroxide; Dihydrophenazine; Redox cycle

摘要：Solar-driven hydrogen peroxide (H2O2) synthesis is crucial for sustainable solar fuel production. Covalent triazine frameworks (CTFs) are promising photocatalysts for solar-driven H2O2 generation due to their tunable structures. However, the catalytic mechanism is not fully understood, and efficiency remains limited, making it a significant challenge to extend their application to practical H2O2 production. To address this, inspired by the role of dihydrophenazine (DHPZ) as an electron transfer carrier in biochemical reactions, we introduce a dihydrophenazine (DHPZ)-functionalized CTF (TA-DHPZ) designed to facilitate effective electron transfer, leveraging DHPZ's redox cycling to promote the reduction of O2 to H2O2. The DHPZ unit in TA-DHPZ sequentially oxidizes to phenazyl radical (PZ center dot+) and phenazinium salt (PZ2+) during H2O2 synthesis, then photoreduces back to DHPZ, maintaining continuous electron flow and lowering the energy barrier. As a result, TA-DHPZ achieves a remarkable H2O2 production rate of 7787 mu mol g- 1h- 1, outperforming its molecular counterpart TA-AN (anthracene-functionalized CTF), by capitalizing on DHPZ's redox efficiency. This investigation not only introduces a valuable functional moiety for the design of CTFs but also lays the groundwork for innovative approaches in molecular-level design of photocatalysts for efficient solar-to-chemical energy conversion.