文献类型：期刊文献

英文题名：Hyperbranched Conjugated Polymer Dots: The Enhanced Photocatalytic Activity for Visible Light-Driven Hydrogen Production

作者：Zhao, Peng[1];Wang, Lijie[2];Wu, Yusen[1];Yang, Tao[1];Ding, Yun[1];Yang, Hua Gui[2];Hu, Aiguo[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai Key Lab Adv Polymer Mat, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Mat Sci & Engn, Minist Educ, Key Lab Ultrafine Mat, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2019

卷号：52

期号：11

起止页码：4376

外文期刊名：MACROMOLECULES

收录：;EI(收录号：20192307006119);WOS:【SCI-EXPANDED(收录号:WOS:000471729000041)】；

基金：The authors gratefully acknowledge the financial support from National Natural Science Foundation of China (21674035), the Fundamental Research Funds for the Central Universities (22221818014) and Shanghai Leading Academic Discipline Project (B502). A.H. thanks the "Eastern Scholar Professorship" support from Shanghai local government. P.Z. thanks Dr. Mingwei Wang for his kind help in light scattering analysis.

语种：英文

外文关键词：Charge transfer - Hydrogen production - Photolysis - Light - Photoelectrons - Photons - Dispersions - Photocatalytic activity

摘要：Conjugated polymer (CP) aggregates with linear/cross-linked structures are widely reported as photocatalysts for hydrogen evolution reaction. For full disclosure of the relationship between the photocatalytic performance and structural features of the CP photocatalysts, homogeneous dispersion of these CPs in aqueous medium is necessary, which however is difficult to be achieved. Herein, we report several coassembled polymeric dots (Pdots) consisting of PEG(45)-b-PMMA(103) and CPs with various structural features. We found that the Pdots of hyperbranched soluble CP nanoparticles (SCPNs) exhibit a high H-2 evolution rate up to 840 mu mol h(-1) g(-1) with no platinum or rhodium as a cocatalyst, superior to their analogues with the linear or cross-linked structure. A possible charge-transfer mechanism suggests that the photoelectrons directly mobilize to the surface of these single-particulate Pdots over three-dimensional skeleton and successfully avoid the ineffective intermolecular charge transfer, leading to the shortened diffusion path of photoelectrons and enhanced photolysis efficacy. We believe that the high dispersion stability (2 months), solution processability, and structural tunability of these Pdots with hyperbranched SCPNs would inspire further research on designing multicomponent photocatalysts for highly efficient visible light-driven hydrogen evolution reaction.