文献类型：期刊文献

英文题名：HCl-Tolerant HxPO4/RuOx-CeO2 Catalysts for Extremely Efficient Catalytic Elimination of Chlorinated VOCs

作者：Dai, Qiguang[1];Shen, Kai[1];Deng, Wei[2];Cai, Yuanpu[1];Yan, Jiaorong[1];Wu, Jinyan[1];Guo, Limin[2];Liu, Rui[3];Wang, Xingyi[1];Zhan, Wangcheng[1,3,4]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Res Inst Ind Catalysis, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]Huazhong Univ Sci & Technol, Sch Environm Sci & Technol, Wuhan 430074, Peoples R China;[3]Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Environm Chem & Ecotoxicol, Beijing 100085, Peoples R China;[4]East China Univ Sci & Technol, Frontiers Sci Ctr Materiobiol & Dynam Chem, Shanghai 200237, Peoples R China

年份：2021

卷号：55

期号：6

起止页码：4007

外文期刊名：ENVIRONMENTAL SCIENCE & TECHNOLOGY

收录：;EI(收录号：20211410169064);WOS:【SCI-EXPANDED(收录号:WOS:000636727200056)】；

基金：This work was supported by the National Key Research and Development Program of China (no. 2016YFC0204300), the National Natural Science Foundation of China (nos. 21922602, 21976056, and 22076047), the Natural Science Foundation of Shanghai (19ZR1412900), Shanghai Science and Technology Innovation Action Plan (20dz1204200), and Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：Cobalt compounds - Catalyst activity - Manganese compounds - Catalyst poisoning - Chlorine compounds - Iron compounds - Volatile organic compounds - Platinum compounds - Sulfur compounds - Chemical stability - Metals - Catalytic oxidation - Copper compounds

摘要：Bulk metal doping and surface phosphate modification were synergically adopted in a rational design to upgrade the CeO2 catalyst, which is highly active but easily deactivated for the catalytic oxidation of chlorinated volatile organic compounds (Cl-VOCs). The metal doping increased the redox ability and defect sites of CeO2, which mostly promoted catalytic activity and inhibited the formation of dechlorinated byproducts but generated polychlorinated byproducts. The subsequent surface modification of the metal-doped CeO2 catalysts with nonmetallic phosphate completely suppressed the formation of polychlorinated byproducts and, more importantly, enhanced the stability of the surface structure by forming a chainmail layer. A highly active, durable, and selective catalyst of phosphate-functionalized RuOx-CeO2 was the most promising among all the metaldoped (Ru, Pd, Pt, Cr, Mn, Fe, Co, and Cu) CeO2 catalysts investigated owing to the prominent chemical stability of RuOx and its superior versatility in the catalytic oxidation of different kinds of Cl-VOCs and other typical pollutants, including dimethyl sulfide, CO, and C3H8. Moreover, the chemical stability of the catalyst, including its bulk and surface structural stability, was investigated by combining intensive treatment with HCl/H2O or HCl with subsequent ex situ ultraviolet-visible light Raman spectroscopy and confirmed the superior resistance to Cl poisoning of the phosphate-functionalized RuOx-CeO2. This work exemplifies a promising strategy for developing ideal catalysts for the removal of Cl-VOCs and provides a catalyst with the superior catalytic performance in Cl-VOC oxidation to date.