文献类型：期刊文献

英文题名：Crystal Engineering of TiO2 for Enhanced Catalytic Oxidation of 1,2-Dichloroethane on a Pt/TiO2 Catalyst

作者：Zhang, Nini[1,2];Li, Xiangmei[1,2];Guo, Yanglong[1,2];Guo, Yun[1,2];Dai, Qiguang[1,2];Wang, Li[1,2];Zhan, Wangcheng[1,2,3]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem & Mol Engn, Res Inst Ind Catalysis, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, Frontiers Sci Ctr Materiobiol & Dynam Chem, Shanghai 200237, Peoples R China

年份：2023

卷号：57

期号：17

起止页码：7086

外文期刊名：ENVIRONMENTAL SCIENCE & TECHNOLOGY

收录：;EI(收录号：20231814040216);WOS:【SCI-EXPANDED(收录号:WOS:000976705800001)】；

基金：N.Z. and W.Z. acknowledge the financial support from the National Key Research and Development Program (2022YFB3504200) and the National Natural Science Foundation of China (21922602 and 22076047). Y.G. thanks the National Natural Science Foundation of China (U21A20326). Y.G. thanks the Shanghai Science and Technology Innovation Action Plan (20dz1204200) and Fundamental Research Funds for the Central Universities (222201717003).

语种：英文

外文关键词：CVOCs; catalytic oxidation; Pt/TiO2; crystal engineering; redox acidity

摘要：Crystal engineering of metal oxide supports represents an emerging strategy to improve the catalytic performance of noble metal catalysts in catalytic oxidation of chlorinated volatile organic compounds (CVOCs). Herein, Pt catalysts on a TiO2 support with different crystal phases (rutile, anatase, and mixed phase (P25)) were prepared for catalytic oxidation of 1,2-dichloroethane (DCE). The Pt catalyst on P25-TiO2 (Pt/TiO2-P) showed optimal activity, selectivity, and stability, even under high-space velocity and humidity conditions. Due to the strong interaction between Pt and P25-TiO2 originating from the more lattice defects of TiO2, the Pt/TiO2-P catalyst possessed stable Pt-0 and Pt2+ species during DCE oxidation and superior redox property, resulting in high activity and stability. Furthermore, the Pt/TiO2-P catalyst possessed abundant hydroxyl groups, which prompted the removal of chlorine species in the form of HCl and significantly decreased the selectivity of vinyl chloride (VC) as the main byproduct. On the other hand, the Pt/TiO2-P catalyst exhibited a different reaction path, in which the hydroxyl groups on its surface activated DCE to form VC and enolic species, besides the lattice oxygen of TiO2 for the Pt catalysts on rutile and anatase TiO2. This work provides guidance for the rational design of catalysts for CVOCs.