Pt-surface oxygen vacancies coupling accelerated photo-charge extraction and activated hydrogen evolution  

作　　者：Fangxu Dai Mingming Zhang Mingzhong Mi Zhenjiang Li Jun Xing Lei Wang 

机构地区：[1]Key Laboratory of Eco-chemical Engineering,Ministry of Education,College of Chemistry and Molecular Engineering,Qingdao University of Science and Technology,Qingdao 266042,China [2]College of Materials Science and Engineering,Qingdao University of Science and Technology,Qingdao 266042,China [3]College of Environment and Safety Engineering,Qingdao University of Science and Technology,Shandong Engineering Research Center for Marine Environment Corrosion and Safety Protection,Qingdao 266042,China

出　　处：《Nano Research》2023年第4期4736-4741,共6页纳米研究（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.51802171,52072197,and 21905154);Outstanding Youth Foundation of Shandong Province,China(No.ZR2019JQ14);Youth Innovation and Technology Foundation of Shandong Higher Education Institutions,China(No.2019KJC004);Major Scientific and Technological Innovation Project(No.2019JZZY020405);Taishan Scholar Program,Major Basic Research Program of Natural Science Foundation of Shandong Province under Grant(No.ZR2020ZD09).

摘　　要：Semiconductors-based heterogeneous photocatalytic water splitting has been extensively studied,but it still remains challenging to accelerate the separation of electron-hole pairs and facilitate the reaction kinetics.Here we report a general strategy to fabricate highly efficient Pt/TiO_(2)photocatalyst by coupling the Pt co-catalysts and surface oxygen vacancies(VO)of TiO_(2).TiO_(2)was pre-modified with alkali or alkaline earth metals ion solutions,which produce a large number of surface hydroxyl on TiO_(2).Subsequently,the photodeposited Pt sub-nanoparticles substitute surface hydroxyl and induce surface VO on TiO_(2).The coupling of Pt and surface VO on TiO_(2)can accelerate the extraction of photo-charges through the interaction of Pt-VO-Ti bonds and reduce the hydrogen evolution barrier,thereby promoting the photocatalytic activity.The synthesized Pt-VO-TiO_(2)sample exhibits a photocatalytic hydrogen evolution activity as high as 1.5 L·g^(−1)·h^(−1),which is 2.2 times that of traditional Pt/TiO_(2).Our findings indepth understand the synergistic effect of co-catalysts and defects on photocatalysis and open up new possibilities for achieving robust photocatalytic water splitting.

关 键 词：oxygen vacancies CO-CATALYST surface hydroxyl PHOTOCATALYTIC hydrogen evolution reaction(HER) 

分 类 号：TQ116.2[化学工程—无机化工]