文献类型：期刊文献

英文题名：Catalytic oxidation of chlorinated volatile organic compounds over Mn-Ti composite oxides catalysts: Elucidating the influence of surface acidity

作者：Liu, Hao[1,2];Li, Xian[1,2];Dai, Qiguang[1,2];Zhao, Hailin[1,2];Chai, Guangtao[1,2];Guo, Yanglong[1,2];Guo, Yun[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 Mat & Dynam Chem, Shanghai 200237, Peoples R China

年份：2021

卷号：282

外文期刊名：APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY

收录：;EI(收录号：20204009292415);WOS:【SCI-EXPANDED(收录号:WOS:000591691300002)】；

基金：H.L. and W.Z. acknowledge financial support from the National Key Research and Development Program of China (2016YFC0204300), the National Natural Science Foundation of China (21922602). Y.G. thanks the National Natural Science Foundation of China (21577035) and the Fundamental Research Funds for the Central Universities (222201717003). L.W. thanks the National Natural Science Foundation of China (21976057).

语种：英文

外文关键词：Composite metal oxides; Surface acidity; Reducibility; Chlorinated volatile organic compounds; Catalytic oxidation

摘要：A series of Mn-Ti composite oxides (MnyTi1-yOx) were prepared via the sol-gel method, and their reducibility and surface acidity were controlled by adjusting the Mn/Ti molar ratio. In addition, as a model reaction, the catalytic activity of Mn-Ti composite oxides for the deep oxidation of vinyl chloride (VC) was evaluated. It was found that the catalyst surface acidity played a decisive role in the oxidation of VC, on the condition that the catalyst reducibility was superior to that of Mn0.4Ti0.6Ox. Consequently, a linear relationship between the surface acidity of the MnyTi1-yOx catalysts (y >= 0.4) and the reaction rate of the VC oxidation process was observed. Moreover, the influence of Lewis acidic sites originating from Ti species on the catalytic activity of the MnyTi1-yOx catalysts was revealed. These results could lead to an efficient strategy for enhancing the CVOC oxidation reaction through finely tuning reducibility and surface acidity of the catalyst.