FTIR spectroscopic characterization of NOx species adsorbed on ZrO2 and ZrO2-SO42-

Simple item page
dc.citation.epage3949en_US
dc.citation.issueNumber15en_US
dc.citation.spage3941en_US
dc.citation.volumeNumber106en_US
dc.contributor.authorKantcheva, M.en_US
dc.contributor.authorCiftlikli, E. Z.en_US
dc.date.accessioned2016-02-08T10:33:25Z
dc.date.available2016-02-08T10:33:25Z
dc.date.issued2002en_US
dc.departmentDepartment of Chemistryen_US
dc.description.abstractThe nature of the NOx species produced during the adsorption of NO at room temperature and during its coadsorption with oxygen on pure and sulfated zirconia has been investigated by means of in situ FTIR spectroscopy. The adsorption of NO on both samples occurs through disproportionation leading to the formation of nitrous acid; water molecules; nitro species; and anionic nitrosyls, NO-. A mechanism for the formation of these adsorption forms is proposed. The NO- species are stable on the surface of zirconia, whereas on the sulfated sample, they are readily oxidized by the SO42- groups. The process of NO disproportionation is favored by wet surfaces and occurs with participation of the tribridged (ZrO2) and terminal (ZrO2-SO42-) hydroxyl groups. Coadsorption of NO and O2 on pure zirconia leads to the formation of various kinds of nitrate species. The presence of sulfate ions reduces the amount of surface nitrates and decreases their thermal stability. An analysis of the combination bands of the nitrate species shows that this spectral region can be used for structural identification of bidentate and bridged nitrates.en_US
dc.identifier.doi10.1021/jp013593oen_US
dc.identifier.issn1089-5647
dc.identifier.urihttp://hdl.handle.net/11693/24717
dc.language.isoEnglishen_US
dc.publisherAmerican Chemical Societyen_US
dc.relation.isversionofhttp://dx.doi.org/10.1021/jp013593oen_US
dc.source.titleJournal of Physical Chemistry Ben_US
dc.subjectStructural identificationen_US
dc.subjectFourier transform infrared spectroscopyen_US
dc.subjectNegative ionsen_US
dc.subjectNitrogen oxidesen_US
dc.subjectOxidationen_US
dc.subjectThermodynamic stabilityen_US
dc.subjectZirconiaen_US
dc.subjectGas adsorptionen_US
dc.titleFTIR spectroscopic characterization of NOx species adsorbed on ZrO2 and ZrO2-SO42-en_US
dc.typeArticleen_US

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
FTIR spectroscopic characterization of NOx species adsorbed on ZrO2 and ZrO2-SO42-.pdf
Size:
140.44 KB
Format:
Adobe Portable Document Format
Description:
Full Printable Version
Download

Collections

Department of Chemistry