Attempts at an in-situ Raman study of Ceria / Zirconia catalysts in PM combustion

DC FieldValueLanguage
dc.contributor.authorSullivan, James A.-
dc.contributor.authorDulgheru, Petrica-
dc.contributor.authorAtribak, Idriss-
dc.contributor.authorBueno-López, Agustín-
dc.contributor.authorGarcía-García, Avelina- Elsevier B.V.en
dc.identifier.citationApplied Catalysis B: Environmentalen
dc.description.abstractCexZr1−xO2 catalysts with various Ce/Zr contents were studied using Raman spectroscopy under different gaseous atmospheres, at different temperatures and in the presence of a model soot. Catalysts with high concentrations of Zr fluoresced at elevated temperatures making analysis of their spectra impossible. This effect became even more pronounced at higher temperatures. CeO2 and solid solutions with relatively low concentrations of Zr showed a red shift and a decrease in intensity of the characteristic F2g peak at high temperatures under different atmospheres. The magnitude of the latter effect was higher under reducing atmospheres. These changes are reversible upon cooling, showing that they relate to a lattice expansion effect rather than any major chemical change to the material. In the presence of the model soot the Raman spectra of all materials was much decreased due to the absorption of the incident and scattered radiation by the soot particles. The presence of soot does not change the relative intensities or positions of the peaks in the spectra of the solid solutions. Evidence is shown for the production of a Ce3+–CO species following interaction between the soot and the surface at high temperature in an inert atmosphere.en
dc.rightsThis is the author’s version of a work that was accepted for publication in Applied Catalysis B: Environmental. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Applied Catalysis B: Environmental, 108-109 (1) 2011-10, pp.134-139. DOI: 10.1016/j.apcatb.2011.08.018en
dc.subjectPM combustionen
dc.subjectIn situ Raman spectroscopyen
dc.titleAttempts at an in-situ Raman study of Ceria / Zirconia catalysts in PM combustionen
dc.typeJournal Articleen
dc.internal.availabilityFull text availableen
dc.statusPeer revieweden
dc.neeo.contributorSullivan|James A.|aut|-
dc.description.adminDG 15/11/12en
item.fulltextWith Fulltext-
Appears in Collections:Chemistry Research Collection
Files in This Item:
File Description SizeFormat 
repository.pdf1.3 MBAdobe PDFDownload
Show simple item record

Citations 20

Last Week
Last month
checked on Mar 21, 2019

Google ScholarTM



This item is available under the Attribution-NonCommercial-NoDerivs 3.0 Ireland. No item may be reproduced for commercial purposes. For other possible restrictions on use please refer to the publisher's URL where this is made available, or to notes contained in the item itself. Other terms may apply.