A spectroscopic study of Au/CeX Zr1-X O2 catalysts
In: Brazilian Journal of Physics, Jg. 39 (2009-04-01), Heft 1a
Online
academicJournal
Zugriff:
The nature of gold species in Au/CeX Zr1-X O2 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.
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A spectroscopic study of Au/CeX Zr1-X O2 catalysts
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Autor/in / Beteiligte Person: | Ferreira, Hadma Sousa ; Rangel, Maria do Carmo ; Ferreira, Márcio L.O. ; Pepe, Iuri ; Silva, Antônio Ferreira da |
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Zeitschrift: | Brazilian Journal of Physics, Jg. 39 (2009-04-01), Heft 1a |
Veröffentlichung: | Sociedade Brasileira de Física, 2009 |
Medientyp: | academicJournal |
ISSN: | 0103-9733 (print) |
DOI: | 10.1590/S0103-97332009000200003 |
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