文献类型：期刊文献

英文题名：Synchronously constructing the optimal redox-acidity of sulfate and RuOx Co-modified CeO2 for catalytic combustion of chlorinated VOCs

作者：Zhang, Nini[2];Guo, Yanglong[1,2];Guo, Yun[1,2];Dai, Qiguang[1,2];Wang, Li[1,2];Dai, Sheng[3,4];Zhan, Wangcheng[1,2,5]

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, Res Inst Ind Catalysis, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, Inst Fine Chem, Sch Chem & Mol Engn, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[4]East China Univ Sci & Technol, Inst Fine Chem, Feringa Nobel Prize Scientist Joint Res Ctr, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China;[5]East China Univ Sci & Technol, Frontiers Sci Ctr Materiobiol & Dynam Chem, Shanghai 200237, Peoples R China

年份：2023

卷号：454

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20224713140017);WOS:【SCI-EXPANDED(收录号:WOS:000895269500001)】；

基金：Acknowledgments N.Z. and W.Z. acknowledge financial support from the National Natural Science Foundation of China (21922602, 22076047) . Y.G. thanks the National Natural Science Foundation of China (U21A20326) . Y.G. thanks the Shanghai Science and Technology Innovation Action Plan (20dz1204200) . S. D. acknowledges the support by Shanghai Rising-star Program (20QA1402400) . L. W. thanks Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：CVOCs; Catalytic oxidation; Sulfate; Redox-acidity; Ru-CeO2

摘要：CeO2-based catalysts are highly active but easily deactivated for the catalytic combustion of chlorinated VOCs (CVOCs), and enhanced redox and acidity are also considered to be effective strategies. However, the screening of practicable modifiers and their preparation method to achieve the promotion and balancing of redox-acidity is still desired. In this work, sulfate and RuOx were simultaneously introduced into CeO2 by a simple co -precipitation method, and the optimal redox-acidity was constructed. The catalytic combustion of 1,2-dichloro-ethane (DCE) indicated that 2.5Ru-CeO2-S0.05 presented an outstanding oxidation activity and selectivity of chlorinated byproducts and superior cycle and long-term stability (at least 60 h at 280 degrees C), even in the presence of 5 % H2O. A series of control experiments, such as the introduction methods, the precursors and contents of Ru and sulfate, and their property characterization revealed that the bulk doping of Ru mainly contributed to the promoted activity and durability through more exposed Ce3+/4+ and oxygen vacancies and the rapid removal ability of the inorganic chlorine species via a semi-Deacon reaction pathway, as well as to the formation of chlorinated byproducts. Meanwhile, the synchronous introduction of sulfate as Bronsted acid sites efficiently inhibited these chlorinated byproducts, while its retained redox ability and the enhanced Lewis acid sites owing to the strong electron withdrawing of the sulfate also further promoted DCE oxidation. Moreover, 2.5Ru-CeO2- S0.05 showed a high activity and excellent durability for the catalytic oxidation of ethylene, vinyl chloride and their mixtures with 1,2-DCE. This work provided a demonstration for balancing the oxidation performance and acidity of CeO2-based catalysts, which contributed to the development of applicable catalysts for catalytic oxidation of CVOCs under actual working conditions.