In situ FT-IR spectroscopic investigation of gold supported on tungstated zirconia as catalyst for CO-SCR of NOx

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dc.citation.epage19en_US
dc.citation.issueNumber1en_US
dc.citation.spage12en_US
dc.citation.volumeNumber191en_US
dc.contributor.authorKantcheva, M.en_US
dc.contributor.authorMilanova, M.en_US
dc.contributor.authorMametsheripov, S.en_US
dc.date.accessioned2015-07-28T12:04:40Z
dc.date.available2015-07-28T12:04:40Z
dc.date.issued2012-09-15en_US
dc.departmentDepartment of Chemistryen_US
dc.description.abstractThe possibility for application of gold supported on tungstated zirconia as catalyst in the selective catalytic reduction of NOx with CO (CO-SCR) has been investigated by means of in situ FT-IR spectroscopy. Tungstated zirconia containing 18 wt% of WO3 was prepared by co-precipitation. Gold was deposited on zirconia and tungstated zirconia by cationic adsorption using [Au(en)2]Cl3 as a precursor (en = ethylenediamine). The FT-IR spectra obtained during the interaction of CO with NOx species adsorbed on the Au/ZrO2–WOx and Au/ZrO2 samples revealed the formation of surface isocyanates attached to the gold particles. The generation of Au–NCO species occurred atlow temperature (25–50 ◦C). The W-containing sample was characterized by higher activity in the ad-NOx + CO reaction than the Wfree one. It is shown that the nitrate species or adsorbed NO2 are essential for the generation of surface isocyanates and the oxidation of NO by oxygen is an important step. The obtained results suggest that Au catalysts supported on tungstated zirconia might be of interest for the selective reduction of NOx with CO at low temperatures.en_US
dc.description.provenanceMade available in DSpace on 2015-07-28T12:04:40Z (GMT). No. of bitstreams: 1 10.1016-j.cattod.2012.03.058.pdf: 683816 bytes, checksum: 566c5538f20f64bc5694c399c216f6fe (MD5)en
dc.identifier.doi10.1016/j.cattod.2012.03.058en_US
dc.identifier.eissn1873-4308
dc.identifier.issn0920-5861
dc.identifier.urihttp://hdl.handle.net/11693/13124
dc.language.isoEnglishen_US
dc.publisherElsevieren_US
dc.relation.isversionofhttp://dx.doi.org/10.1016/j.cattod.2012.03.058en_US
dc.source.titleCatalysis Todayen_US
dc.subjectAu/zro2-woxen_US
dc.subjectIn Situ Ft-ir Spectroscopyen_US
dc.subjectNox + Co Surface Reactionen_US
dc.subjectCO-SCR of NOxen_US
dc.titleIn situ FT-IR spectroscopic investigation of gold supported on tungstated zirconia as catalyst for CO-SCR of NOxen_US
dc.typeArticleen_US

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