文献类型：期刊文献

英文题名：Amorphous and homogeneously Zr-doped MnOx with enhanced acid and redox properties for catalytic oxidation of 1,2-Dichloroethane

作者：Chen, Gong[1];Hong, Dongsen[1];Xia, Hangqi[1];Sun, Wei[1];Shao, Shijie[1];Gong, Binwei[1];Wang, Shun[1];Wu, Jinyan[1];Wang, Xingyi[1];Dai, Qiguang[1]

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

年份：2022

卷号：428

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20212810625060);WOS:【SCI-EXPANDED(收录号:WOS:000724532400001)】；

基金：This work was supported by the National Key Research and Development Program of China (No. 2016YFC0204300), National Natural Science Foundation of China (No. 21777043 and 21976056), and Natural Science Foundation of Shanghai (19ZR1412900).

语种：英文

外文关键词：Catalytic combustion; CVOCs; Acid-redox; Zr-Mn oxide; Amorphous

摘要：Series of MnOx based catalysts were prepared and investigated for 1,2-dichloroethane (1,2-DCE) oxidation. RZrMn prepared by a novel reflux method presented an amorphous structure and homogeneous dispersion of Zr, which prominently enhanced acid and redox properties, such as more surface oxygen species and vacancies (OAds/OLatt = 0.53), better reducibility, severer Jahn-Teller distortion, more total acid amount (396 mu mol.g- 1) and Bronsted acid sites. Compared with the pristine MnOx and ZrO2, R-ZrMn exhibited a better catalytic activity for 1,2-DCE oxidation (T90 = 287 degrees C and the reaction rate at 150 degrees C was 5.13 mu mol min- 1.g- 1), less formation of chlorinated by-products, high durability and resistance-H2O. Catalytic oxidation of 1,2-DCE and the formation of chlorinated by-products on MnOx based catalysts was typically represented as a synergistic catalysis process of acid and redox sites, and a positive relationship between total acid amount or OAds/OLatt and reaction rate of 1,2DCE oxidation was clearly observed. Meanwhile, a possible mechanism and formation pathway were proposed.