Please use this identifier to cite or link to this item: https://scholarhub.balamand.edu.lb/handle/uob/2396
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dc.contributor.authorAboukaïs, Antoineen_US
dc.contributor.authorAouad, Sameren_US
dc.contributor.authorAyadi, Houda Elen_US
dc.contributor.authorSkaf, Miraen_US
dc.contributor.authorLabaki, Madonaen_US
dc.contributor.authorCousin, Renauden_US
dc.contributor.authorAbi Aad, Edmonden_US
dc.date.accessioned2020-12-23T09:12:25Z-
dc.date.available2020-12-23T09:12:25Z-
dc.date.issued2012-
dc.identifier.urihttps://scholarhub.balamand.edu.lb/handle/uob/2396-
dc.description.abstractAu/CeO2 (4 wt.% gold) solid was prepared using the deposition–precipitation method. The deposition of gold on ceria did not affect its specific surface area (122 m2 g−1/400 °C). The average diameter of gold particles obtained was estimated to be equal to 3.9 nm. Moreover, 60% of the gold was in the form of nanoparticles with a size ranging between 3 and 4 nm. 80% of the gold in the nanoparticles was in the metallic form Au0 and 20% was present as Au+. These latter cations interact directly with the O2− anions of CeO2. When evacuated at 400 °C for 1 h, the cations were reduced into Au0. All the adsorptions were performed on solids treated under vacuum at 400 °C for 1 h. The adsorption of O2 at room temperature led to the formation of O2− species. The adsorption of 17O-enriched molecular oxygen demonstrated that the two oxygen atoms in O2− are equivalent. When CO was introduced, it reacted with the O2− of the support to give CO2−. When NO2, NO or N2O were added at room temperature, they decomposed to form adsorbed O2− species at the surface of the solid. Highlights ► Au/CeO2 solid prepared by the deposition–precipitation method presents highly dispersed Au nanoparticles. ► The adsorption on Au/CeO2 of NO, NO2, N2O and O2 leads to the formation of O2−. ► The adsorption of CO on Au/CeO2 leads to the formation of CO2−. ► The adsorption of 17O2 on Au/CeO2 shows that the two adsorbed oxygen are equivalent.en_US
dc.format.extent7 p.en_US
dc.language.isoengen_US
dc.subjectAdsorptionen_US
dc.subjectOxidesen_US
dc.subjectPrecipitationen_US
dc.subjectElectron microscopyen_US
dc.subjectElectron resonanceen_US
dc.titlePhysicochemical characterization of Au/CeO2 solid. Part 1: the deposition–precipitation preparation methoden_US
dc.typeJournal Articleen_US
dc.identifier.doi10.1016/j.matchemphys.2012.07.022-
dc.contributor.affiliationDepartment of Chemistryen_US
dc.description.volume137en_US
dc.description.issue1en_US
dc.description.startpage34en_US
dc.description.endpage41en_US
dc.date.catalogued2017-11-20-
dc.description.statusPublisheden_US
dc.identifier.ezproxyURLhttp://ezsecureaccess.balamand.edu.lb/login?url=https://doi.org/10.1016/j.matchemphys.2012.07.022en_US
dc.identifier.OlibID175083-
dc.relation.ispartoftextMaterials chemistry and physicsen_US
dc.provenance.recordsourceOliben_US
Appears in Collections:Department of Chemistry
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