文献类型：期刊文献

英文题名：Polyoxometalate-mediated dual-state Pt single atoms on TiO2 with light-amplified charge polarization for cooperative oxidation

作者：Han, Xiaowei[1];Cheng, Jingxian[1];Wu, Xiao[1];Zhang, Jinlong[1];Lei, Juying[2];Zhou, Liang[2];Ye, Ziwei[1];Wang, Lingzhi[1]

机构：[1]East China Univ Sci & Technol, Feringa Nobel Prize Scientist Joint Res Ctr, Key Lab Adv Mat Joint Int Res Lab Precis Chem & Mo, Sch Chem & Mol Engn,Shanghai Engn Res Ctr Multimed, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, State Environm Protect Key Lab Environm Risk Asses, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2026

卷号：542

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20260178465);WOS:【SCI-EXPANDED(收录号:WOS:001795554900001)】；

基金：This work was supported by National Key Research and Development Program of China (2022YFE0107900), National Natural Science Foundation of China (22472056 and 22461142136), the Science and Technology Commission of Shanghai Municipality (21ZR1417900, 2018SHZDZX03, 22230780200, and 20DZ2250400), the Innovation Program of Shanghai Municipal Education Commission (2021-01-07-00-02-E00106), and the Fundamental Research Funds for the Central Universities (222201717003). 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：Single atoms; Electronic regulation; O2 activation; Catalytic oxidation

摘要：Controlling both dispersion and electronic state of noble metals remains a central challenge in heterogeneous catalysis since strong metal-support coordination stabilizes single atoms but often retain oxidized states. Here we report a light-amplified Pt charge-polarization strategy that creates two electronically distinct Pt single-atom populations and light illumination further enlarges their charge contrast. A phosphotungstic acid (HPW)-mediated interface enables Pt atoms to disperse on both TiO2 and HPW. After air calcination, cationic Pt persists on TiO2 alongside electron-rich Pt on HPW. Upon irradiation, photogenerated carriers migrate oppositely so that holes accumulate on TiO2-anchored Pt while electrons accumulate on HPW-anchored Pt as evidenced by in situ CO-FTIR. Using toluene and propane oxidation as model reactions, we show that the polarized Pt sites couple hydrocarbon conversion with O2 activation, delivering superior activity and durability compared with Pt/TiO2. This work establishes a general route to reconcile atomic dispersion with photo-intensifiable redox functionality in noble-metal catalysis.