A spectroscopic study of Au/CeXZr1-XO2 catalysts

dc.creatorFerreira, Hadma Sousa
dc.creatorVarela, Maria do Carmo Rangel Santos
dc.creatorFerreira, Márcio Luís Oliveira
dc.creatorPepe, Iuri Muniz
dc.creatorSilva, Antônio Ferreira da
dc.creatorFerreira, Hadma Sousa
dc.creatorVarela, Maria do Carmo Rangel Santos
dc.creatorFerreira, Márcio Luís Oliveira
dc.creatorPepe, Iuri Muniz
dc.creatorSilva, Antônio Ferreira da
dc.date.accessioned2012-10-08T18:33:43Z
dc.date.accessioned2022-10-07T15:44:14Z
dc.date.available2012-10-08T18:33:43Z
dc.date.available2022-10-07T15:44:14Z
dc.date.created2012-10-08T18:33:43Z
dc.date.issued2009-04
dc.identifier0103-9733
dc.identifierhttp://www.repositorio.ufba.br/ri/handle/ri/6895
dc.identifierv. 39, n. 1
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/4005757
dc.description.abstractThe nature of gold species in Au/CeXZr1-XO2 catalysts was successfully investigated using the visible and near infrared photoacoustic spectroscopy and Fourier transform infrared spectroscopy of adsorbed carbon monoxide. It was found that the visible and near infrared photoacoustic spectroscopy is a powerful technique for investigating the changes of gold particle size due to addition of zirconium and the oxidation state of gold particles. It was also noted that the increase of zirconium in the solids makes gold incorporation more difficult due to the electronic shielding caused by zirconium, decreasing the probability of replacing cerium by gold. For the samples studied, the particle size ranged from 20-30 nm and the Au+, Au3+ and Auº species were found in the catalysts.
dc.languageen
dc.sourcehttp://dx.doi.org/10.1590/S0103-97332009000200003
dc.subjectGold catalysts
dc.subjectPhotoacoustic spectroscopy
dc.subjectCO adsorbed
dc.titleA spectroscopic study of Au/CeXZr1-XO2 catalysts
dc.typeArtigo de Periódico


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