文献类型：期刊文献

中文题名：Understanding the role of tungsten on Pt/CeO_(2)for vinyl chloride catalytic combustion

作者：Qifeng Zhang[1];Zhengbo Zhou[1];Tian Fang[1];Han Gu[1];Yanglong Guo[1];Wangcheng Zhan[1];Yun Guo[1];Li Wang[1]

机构：[1]Key Laboratory for Advanced Materials and Research Institute of Industrial Catalysis,School of Chemistry&Molecular Engineering,East China University of Science and Technology,Shanghai 200237,China

年份：2022

卷号：40

期号：9

起止页码：1462

中文期刊名：Journal of Rare Earths

外文期刊名：稀土学报（英文版）

收录：CSTPCD;;Scopus;CSCD:【CSCD2021_2022】；

基金：Project supported by the National Key Research and Development Program of China(2016YFC0204300);the National Natural Science Foundation of China(21976057,21922602);the"Shanghai Science and Technology Innovation Plan"Program(19DZ1208000);Innovation plan for college students。

语种：英文

中文关键词：Tungsten oxides;Vinyl chloride;Catalytic oxidation;Pt/CeO_(2);By-products;Rare earths

摘要：Spherical CeO_(2)synthesized by the hydrothermal process was used as support to prepare Pt/WO_(3)/CeO_(2),and the effects of tungsten(W)contents on activity,stability and polychlorinated by-products were investigated to understand the role of W for vinyl chloride(VC)catalytic oxidation.The introduction of12 wt%W to Pt/CeO_(2)(P12 WC)exhibits the highest catalytic activity with 90%conversion of VC at 250℃,meanwhile the stability improves and the polychlorinated by-products in the tail gas significantly decrease due to the removal of dissociated Cl species in the formation of HCl.The beneficial effects of W on Pt/CeO_(2)are closely related to the chemical state of Pt,redox and surface acid sites distribution.The doped W not only makes Pt disperse evenly on the support with the high valence,but also weakens the interaction between Pt and CeO_(2)by the formation of Pt-O-W and Pt-O-W-O-Ce species,which facilitates oxygen mobility.In addition,the modification of W species also significantly increases the surface acidity amount and changes the distribution of acid sites.