文献类型：期刊文献

英文题名：Superior catalytic performance of Pd-loaded oxygen-vacancy-rich TiO2 for formaldehyde oxidation at room temperature

作者：He, Miao[1];Cao, Yueqiang[4];Ji, Jian[1];Li, Kai[1];Huang, Haibao[1,2,3]

机构：[1]Sun Yat Sen Univ, Sch Environm Sci & Engn, 132 East Waihuan Rd, Guangzhou 510006, Peoples R China;[2]Sun Yat Sen Univ, Guangdong Indoor Air Pollut Control Engn Res Ctr, 132 East Waihuan Rd, Guangzhou 510006, Peoples R China;[3]Sun Yat Sen Univ, Guangdong Prov Key Lab Environm Pollut Control &, 132 East Waihuan Rd, Guangzhou 510006, Peoples R China;[4]East China Univ Sci & Technol, State Key Lab Chem Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2021

卷号：396

起止页码：122

外文期刊名：JOURNAL OF CATALYSIS

收录：;EI(收录号：20211010020609);WOS:【SCI-EXPANDED(收录号:WOS:000641079800011)】；

基金：This research was supported by THE Guangdong Basic and Applied Basic Research Foundation (2020A1515010865) , the National Natural Science Foundation of China (22076224 & 21677179) , the Fundamental Research Funds for the Central Universities (20lgjc03 and 20lgpy95) , the Open Fund of Guangdong Province Engineering Laboratory for Air Pollution Control (2019323609-01) and a fund from the Hunan Construction Engineering Group.

语种：英文

外文关键词：Reduced TiO2; Electronic metal-support interaction; Formaldehyde oxidation; Surface oxygen vacancies; Synergistic effect

摘要：Modulating the metal-support interaction is a promising way to tailor the electronic structure of metal nanoparticles and hence alter their catalytic performance. Here, we developed a reduced TiO2 with rich oxygen vacancies on which to load Pd for catalytic oxidation of formaldehyde (HCHO) at room temperature. The reduced TiO2 remarkably induced an electronic metal-support interaction by transferring electrons from the support to Pd to form negatively charged Pd nanoparticles, facilitating the oxygen association. Simultaneously, the reduced TiO2 significantly increased the dispersion and the reduction degree of Pd compared with the pristine TiO2 by offering more anchor sites and electron-rich sites. Furthermore, the abundant oxygen vacancies in the reduced TiO2 show a synergistic effect by enabling the effective adsorption and dissociation of water to generate surface hydroxyl groups, accelerating the kinetics of active oxygen species generation and promoting the complete conversion of 100 ppm HCHO at a WHSV of 120,000 mL/(g(cat).h). We tentatively propose two reaction mechanisms for HCHO oxidation over Pd-loaded oxygen-vacancy-rich TiO2 involving active oxygen species. (C) 2021 Elsevier Inc. All rights reserved.