HCl-Tolerant HxPO4/RuOx–CeO2 Catalysts for Extremely Efficient Catalytic Elimination of Chlorinated VOCs
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 abilit...
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Veröffentlicht in: | Environmental science & technology 2021-03, Vol.55 (6), p.4007 |
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description | 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 metal-doped (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. |
doi_str_mv | 10.1021/acs.est.0c08256 |
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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 metal-doped (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.</description><identifier>ISSN: 0013-936X</identifier><identifier>DOI: 10.1021/acs.est.0c08256</identifier><language>eng</language><publisher>Easton: American Chemical Society</publisher><subject>By products ; Byproducts ; Catalysts ; Catalytic activity ; Catalytic oxidation ; Cerium oxides ; Chromium ; Copper ; Corrosion resistance ; Dechlorination ; Design modifications ; Dimethyl sulfide ; Doping ; Iron ; Manganese ; Metals ; Organic compounds ; Oxidation ; Palladium ; Platinum ; Pollutants ; Raman spectroscopy ; Structural stability ; Surface stability ; Surface structure ; Ultraviolet radiation ; VOCs ; Volatile organic compounds</subject><ispartof>Environmental science & technology, 2021-03, Vol.55 (6), p.4007</ispartof><rights>Copyright American Chemical Society Mar 16, 2021</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids></links><search><creatorcontrib>Dai, Qiguang</creatorcontrib><creatorcontrib>Shen, Kai</creatorcontrib><creatorcontrib>Deng, Wei</creatorcontrib><creatorcontrib>Cai, Yuanpu</creatorcontrib><creatorcontrib>Yan, Jiaorong</creatorcontrib><creatorcontrib>Wu, Jinyan</creatorcontrib><creatorcontrib>Guo, Limin</creatorcontrib><creatorcontrib>Liu, Rui</creatorcontrib><creatorcontrib>Wang, Xingyi</creatorcontrib><creatorcontrib>Zhan, Wangcheng</creatorcontrib><title>HCl-Tolerant HxPO4/RuOx–CeO2 Catalysts for Extremely Efficient Catalytic Elimination of Chlorinated VOCs</title><title>Environmental science & technology</title><description>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 metal-doped (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.</description><subject>By products</subject><subject>Byproducts</subject><subject>Catalysts</subject><subject>Catalytic activity</subject><subject>Catalytic oxidation</subject><subject>Cerium oxides</subject><subject>Chromium</subject><subject>Copper</subject><subject>Corrosion resistance</subject><subject>Dechlorination</subject><subject>Design modifications</subject><subject>Dimethyl sulfide</subject><subject>Doping</subject><subject>Iron</subject><subject>Manganese</subject><subject>Metals</subject><subject>Organic compounds</subject><subject>Oxidation</subject><subject>Palladium</subject><subject>Platinum</subject><subject>Pollutants</subject><subject>Raman spectroscopy</subject><subject>Structural stability</subject><subject>Surface stability</subject><subject>Surface structure</subject><subject>Ultraviolet radiation</subject><subject>VOCs</subject><subject>Volatile organic compounds</subject><issn>0013-936X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><recordid>eNotUMtKw0AUnYWCtbp2O-A67Z1HXksZoi0UIlLFXZnMAxOmmZqZQLvzH_xDv8RIXR0OnBcHoTsCCwKULKUKCxPiAhQUNM0u0AyAsKRk2fsVug6hAwDKoJihbiVcsvXODLKPeHV8rvnyZayPP1_fwtQUCxmlO4UYsPUDro5xMHvjTriytlWtmTxnRWwVrly7b3sZW99jb7H4cH7440bjt1qEG3RppQvm9h_n6PWx2opVsqmf1uJhkxwoyWJSaKm54iQvG55TonmZMV4qU1CmLEimlDGU6mk-b7QkBWRSQ6qt0rqRKQCbo_tz7mHwn-N0w67z49BPlTuaQk5yAjxlv6bqWlU</recordid><startdate>20210316</startdate><enddate>20210316</enddate><creator>Dai, Qiguang</creator><creator>Shen, Kai</creator><creator>Deng, Wei</creator><creator>Cai, Yuanpu</creator><creator>Yan, Jiaorong</creator><creator>Wu, Jinyan</creator><creator>Guo, Limin</creator><creator>Liu, Rui</creator><creator>Wang, Xingyi</creator><creator>Zhan, Wangcheng</creator><general>American Chemical Society</general><scope>7QO</scope><scope>7ST</scope><scope>7T7</scope><scope>7U7</scope><scope>8FD</scope><scope>C1K</scope><scope>FR3</scope><scope>P64</scope><scope>SOI</scope></search><sort><creationdate>20210316</creationdate><title>HCl-Tolerant HxPO4/RuOx–CeO2 Catalysts for Extremely Efficient Catalytic Elimination of Chlorinated VOCs</title><author>Dai, Qiguang ; 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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 metal-doped (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.</abstract><cop>Easton</cop><pub>American Chemical Society</pub><doi>10.1021/acs.est.0c08256</doi></addata></record> |
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subjects | By products Byproducts Catalysts Catalytic activity Catalytic oxidation Cerium oxides Chromium Copper Corrosion resistance Dechlorination Design modifications Dimethyl sulfide Doping Iron Manganese Metals Organic compounds Oxidation Palladium Platinum Pollutants Raman spectroscopy Structural stability Surface stability Surface structure Ultraviolet radiation VOCs Volatile organic compounds |
title | HCl-Tolerant HxPO4/RuOx–CeO2 Catalysts for Extremely Efficient Catalytic Elimination of Chlorinated VOCs |
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