Terphenyl Functionalized Covalent Triazine Polymer as Metal‐Free Photocatalyst for Superior Hydrogen Peroxide Production
Qinhua Zhang, Jingyuan Zhou, Haonan Zhang, Chong Qi, Qiang Zhou, Runze Guo, Hao Yang, Tao Xing, Mingqing Wang, Mingbo Wu, Wenting Wu
Abstract
Abstract Artificial photosynthesis of H 2 O 2 from H 2 O and O 2 by visible light is a promising approach, but the efficiency is still unsatisfactory because of the inefficient O 2 adsorption and proton supply. Here, terphenyl functionalized covalent triazine polymer (CTP‐TD) is prepared for efficient H 2 O 2 production. Experimental and theoretical results show that terphenyl structure can promote O 2 adsorption by regulating the oxygen evolution (O 2 → 1 O 2 ) and improve proton supply by accelerating water oxidation. The terphenyl structure significantly promotes the singlet oxygen ( 1 O 2 ) production via the intersystem crossing (ISC) process. The electrophilic 1 O 2 is more easily adsorbed on the catalyst surface than O 2 . Simultaneously, the accumulated holes at the terphenyl structure lower water oxidation energy barriers and accelerate the water dehydrogenation process. This work provides a valuable reference and new inspiration for the polymer design of efficient H 2 O 2 generation from the perspective of reactant supply.