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Environ Sci Technol

Title:		HCl-Tolerant H(x)PO(4)/RuO(x)-CeO(2) Catalysts for Extremely Efficient Catalytic Elimination of Chlorinated VOCs
Author(s):		Dai Q; Shen K; Deng W; Cai Y; Yan J; Wu J; Guo L; Liu R; Wang X; Zhan W;
Address:		"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, P. R. China. School of Environmental Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, P. R. China. State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, P. R. China. Frontiers Science Centre for Materiobiology and Dynamic Chemistry, East China University of Science and Technology, Shanghai 200237, P. R. China"
Journal Title:		Environ Sci Technol
Year:		2021
Volume:		20210305
Issue:		6
Page Number:		4007 - 4016
DOI:		10.1021/acs.est.0c08256
ISSN/ISBN:		1520-5851 (Electronic) 0013-936X (Linking)
Abstract:		"Bulk metal doping and surface phosphate modification were synergically adopted in a rational design to upgrade the CeO(2) 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 CeO(2), which mostly promoted catalytic activity and inhibited the formation of dechlorinated byproducts but generated polychlorinated byproducts. The subsequent surface modification of the metal-doped CeO(2) 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 RuO(x)-CeO(2) was the most promising among all the metal-doped (Ru, Pd, Pt, Cr, Mn, Fe, Co, and Cu) CeO(2) catalysts investigated owing to the prominent chemical stability of RuO(x) and its superior versatility in the catalytic oxidation of different kinds of Cl-VOCs and other typical pollutants, including dimethyl sulfide, CO, and C(3)H(8). Moreover, the chemical stability of the catalyst, including its bulk and surface structural stability, was investigated by combining intensive treatment with HCl/H(2)O or HCl with subsequent ex situ ultraviolet-visible light Raman spectroscopy and confirmed the superior resistance to Cl poisoning of the phosphate-functionalized RuO(x)-CeO(2). 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"
Keywords:		Catalysis Oxidation-Reduction *Phosphates;
Notes:		"MedlineDai, Qiguang Shen, Kai Deng, Wei Cai, Yuanpu Yan, Jiaorong Wu, Jinyan Guo, Limin Liu, Rui Wang, Xingyi Zhan, Wangcheng eng Research Support, Non-U.S. Gov't 2021/03/06 Environ Sci Technol. 2021 Mar 16; 55(6):4007-4016. doi: 10.1021/acs.est.0c08256. Epub 2021 Mar 5"