光催化
共轭体系
离域电子
选择性
光化学
材料科学
电子转移
聚合物
纳米技术
载流子
量子产额
激子
化学工程
化学
光电子学
有机化学
荧光
催化作用
复合材料
光学
物理
量子力学
工程类
作者
Chen Xu,Zhi‐An Lan,Qian Chen,Xirui Zhang,Xiong Chen,Guigang Zhang,Xinchen Wang
标识
DOI:10.1002/anie.202303785
摘要
Conjugated polymers (CPs) represent a promising platform for photocatalytic CO2 fixation owing to their suitable band structures that meet the requirements of the reduction potential of CO2 to value-added fuels. However, the photocatalytic performance of CPs is rather restrained by the low charge transfer efficiency. Herein, we rationally designed three CPs with a more delocalized electronic transmission channel and planar molecular structure, which are regarded to evidently reduce the exciton binding energy (Eb ) and accelerate the internal charge transfer process. Besides, the assembly of suitable electron-output "tentacles" and cocatalysts on the surface of CPs could effectively facilitate interfacial electron delivery. Accordingly, the optimal P-2CN exhibits an apparent quantum yield of 4.6 % at 420 nm for photocatalytic CO2 to CO. Further adjusting the amounts of cyano groups and cocatalysts, the CO selectivity could be obtained in the range of 0-80.5 %.
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