In situ FT-IR investigation of the reduction of NO with CO over Au/CeO2-Al2O3 catalyst in the presence and absence of H2

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dc.citation.epage126en_US
dc.citation.issueNumber1-2en_US
dc.citation.spage113en_US
dc.citation.volumeNumber88en_US
dc.contributor.authorKantcheva, M.en_US
dc.contributor.authorSamarskaya, O.en_US
dc.contributor.authorIlieva, L.en_US
dc.contributor.authorPanteleo, G.en_US
dc.contributor.authorVenezia, A. M.en_US
dc.contributor.authorAndreeva, D.en_US
dc.date.accessioned2015-07-28T11:58:36Z
dc.date.available2015-07-28T11:58:36Z
dc.date.issued2009en_US
dc.departmentDepartment of Chemistryen_US
dc.description.abstracthe NO + CO + H-2 reaction over CeO2, Au/CeO2 (3 wt% Au), Au/CeO2-Al2O3 (2.9 wt% Au, 20 wt% Al2O3) and CeO2-Al2O3 mixed support prepared by co-precipitation has been Studied by FT-IR spectroscopy at elevated temperatures. Formation of NCO species has been detected on all of the samples. The presence of metallic gold is not necessary for the generation of the isocyanates on ceria and the mixed ceria-alumina support. The NCO species are produced by a process involving the dissociation of NO on the oxygen vacancies of the support, followed by the reaction between N atoms lying oil the surface and CO molecules. Gold plays an important role in the modification of ceria leading to Ce3+ and oxygen vacancies formation, and causes significant lowering of the reduction temperature of CeO2 and CeO2-Al2O3 enhancing the reducibility of ceria surface layers. The role of H-2 is to keep the surface reduced during the course of the reaction. The onset temperature, at which the interaction between the surface isocyanates and No begins, is low (100 degrees C). This explains the high activity of the Au/CeO2-Al2O3 catalyst with 100% selectivity in the reduction of NO by CO at low temperature (200 degrees C) and in the presence of H-2 (C) 2008 Elsevier B.V. All rights reserveden_US
dc.description.provenanceMade available in DSpace on 2015-07-28T11:58:36Z (GMT). No. of bitstreams: 1 10.1016-j.apcatb.2008.09.023.pdf: 1113422 bytes, checksum: bb979d2b743c96acb32a762743f9005e (MD5)en
dc.identifier.doi10.1016/j.apcatb.2008.09.023en_US
dc.identifier.eissn1873-3883
dc.identifier.issn0926-3373
dc.identifier.urihttp://hdl.handle.net/11693/11730
dc.language.isoEnglishen_US
dc.publisherElsevieren_US
dc.relation.isversionofhttp://dx.doi.org/10.1016/j.apcatb.2008.09.023en_US
dc.source.titleApplied Catalysis B: Environmentalen_US
dc.subjectCeriaen_US
dc.subjectCeria-aluminaen_US
dc.subjectSupported golden_US
dc.subjectNO Reduction by COen_US
dc.subjectMechanismen_US
dc.subjectIn situ FT-IR spectroscopyen_US
dc.titleIn situ FT-IR investigation of the reduction of NO with CO over Au/CeO2-Al2O3 catalyst in the presence and absence of H2en_US
dc.typeArticleen_US

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