文献类型：期刊文献

英文题名：Exceptionally stable CePO4 and RuO2 contributing to catalytic oxidation of 1,2-dichloroethane on Co3O4 catalysts: Complete inhibition of chlorinated byproducts

作者：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]East China Univ Sci & Technol, Sch Chem & Mol Engn, State Key Lab Green Chem Engn & Ind Catalysis, Shanghai 200237, Peoples R China;[2]Erdos Elect Power & Met Grp Co Ltd, Ordos 016064, Inner Mongolia, Peoples R China

年份：2023

卷号：351

外文期刊名：FUEL

收录：;EI(收录号：20232514268620);WOS:【SCI-EXPANDED(收录号:WOS:001023017600001)】；

基金：Acknowledgements This work was supported by the National Key Research and Devel-opment Program of China (2022YFB3504200) and National Natural Science Foundation of China (22276055 and 21922602) .

语种：英文

外文关键词：Catalytic combustion; CVOCs; Phosphate; Chlorinated byproducts

摘要：Highly toxic, reactive and refractory chlorinated VOCs (Cl-VOCs) is urgent for purification by the most favoured catalytic oxidation technique, however, the formation of polychlorinated byproducts is huge obstacle for most catalysts. Here, nanorods assembled monoclinic CePO4 microspheres were synthesized and used as the support of highly active but low-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 degrees 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.