文献类型：期刊文献

英文题名：Exceptionally Stable Cepo4 and Ruo2 for Catalytic Oxidation of 1,2-Dichloroethane on Co3o4 Catalysts: Synergetic Inhibition of Chlorinated Byproducts

作者：Dai, Vista[2]; Xia, Hangqi[1,2]; Liu, Lilin[1]; Niu, Qiang[2]; Wang, Feng[1]; Zhang, Hao[1]; Zhan, Wangcheng[1]; Wang, Xingyi[1]; Dai, Qiguang[1]

机构：[1] Key Laboratory for Advanced Materials, Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai, 200237, China; [2] Erdos Electric Power and Metallurgy Group Co. Ltd., Inner Mongolia, Ordos, 016064, China

年份：2023

外文期刊名：SSRN

收录：EI(收录号：20230093961)

语种：英文

外文关键词：Ascorbic acid - Catalysis - Catalyst activity - Catalyst selectivity - Cerium compounds - Chelation - Chlorine compounds - Ligands - Ruthenium compounds - Silicon compounds

摘要：Highly toxici, reactive and refractory chlorinated VOCs (Cl-VOCs) is urgent for purification by the most favoured catalytic oxidation technique, however, the formation of polycholoriated byproducts is hugely obstacle for most catalysts. Here, monoclinic and 3D urchin-like CePO4 was synthesized and used as the support of highly active but lowly selective Co3O4 for catalytic oxidation of Cl-VOCs. The prepared Co3O4/CePO4 using ascorbic acid (AA) as a chelating agent presented a high activity and low selectivity of vinyl chloride (VC) for catalytic oxidation of 1,2-dichloroethane (DCE) due to the high dispersion of Co3O4, compared with bulk Co3O4 and Co3O4/SiO2, possible polychlorinated byproducts were completely inhibited in the presence of CePO4 support. The co-introduction of RuO2 further suppressed the formation of VC as a representative dechlorinated byproduct owing to the enhanced redox ability and migration of surface lattice oxygen, below 0.5% VC selectivity was detected on the optimized RuCoOx/CePO4 and completely disappeared above 275 °C. Moreover, RuCoOx/CePO4 also revealed the superior versatility, durability and thermal stability as well as the outstanding resistance to CO2, H2O and sulfur. The restraint of polychlorinated byproducts also can be achieved by other phosphates besides CePO4 and attributed to the strong coordination effect and electron-withdrawing function of PO43-. This work was contributed to further understand the inhibition of chlorinated byproducts for catalytic oxidation of Cl-VOCs and rationally design full-featured catalysts. ? 2023, The Authors. All rights reserved.