Improvement of thermal stability of highly active species on SiO2supported copper-ceria catalysts

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dc.contributor.authorAguila, Gonzalo
dc.contributor.authorCalle, Rafael
dc.contributor.authorGuerrero, Sichem
dc.contributor.authorBaeza, Patricio
dc.contributor.authorAraya, Paulo
dc.date.accessioned2025-05-05T15:20:27Z
dc.date.available2025-05-05T15:20:27Z
dc.date.issued2021-09-28
dc.descriptionIndexación: Scopus.
dc.description.abstractCuO-CeO2/SiO2 catalysts lose activity when they are calcined at 600 °C and temperatures above. This loss of activity was related to a decrease in the amount of highly dispersed Cu species interacting with Ce (CuO-CeO2 interface) over the SiO2 support. These species are highly active in CO oxidation, so this reaction was selected to conduct this study. In order to avoid the activity loss in CuO-CeO2/SiO2 catalysts, the effect of high Ce loads (8, 16, 24, and 36%) on the thermal stability of these catalysts was studied. The results reveal that when increasing calcination temperature from 500 to 700 °C, the catalysts with Ce load equal to or higher than 24% increase the formation of highly dispersed Cu interacting with Ce and therefore the activity (90% of CO conversion at 120 °C). In catalysts with Ce load below 24%, Cu species agglomerate and decrease the activity (less than 5% of CO conversion at 120 °C). This journal is © The Royal Society of Chemistry.
dc.description.urihttps://pubs.rsc.org/en/content/articlelanding/2021/ra/d1ra06204b
dc.identifier.citationRSC Advances, Volume 11, Issue 53, Pages 33271 - 33275, 28 September 2021
dc.identifier.doi10.1039/d1ra06204b
dc.identifier.issn2046-2069
dc.identifier.urihttps://repositorio.unab.cl/handle/ria/64479
dc.language.isoen
dc.publisherRoyal Society of Chemistry
dc.rights.licenseAttribution 3.0 Unported CC BY 3.0 Deed
dc.rights.urihttps://creativecommons.org/licenses/by/3.0/
dc.subjectCalcination
dc.subjectCatalyst activity
dc.subjectCerium
dc.subjectCerium oxide
dc.subjectCopper
dc.subjectCopper oxides
dc.subjectThermodynamic stability
dc.titleImprovement of thermal stability of highly active species on SiO2supported copper-ceria catalysts
dc.typeArtículo
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