| Journal: | Brazilian journal of physics |
| Database: | PERIÓDICA |
| System number: | 000403099 |
| ISSN: | 0103-9733 |
| Authors: | Ferreira, Hadma Sousa1 Rangel, Maria do Carmo1 Ferreira, Marcio L.O1 Pepe, Iuri2 Silva, Antonio Ferreira da2 |
| Institutions: | 1Universidade Federal da Bahia, Instituto de Quimica, Salvador, Bahia. Brasil 2Universidade Federal da Bahia, Instituto de Fisica, Salvador, Bahia. Brasil |
| Year: | 2009 |
| Season: | Abr |
| Volumen: | 39 |
| Number: | 1A |
| Pages: | 141-145 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Analítico |
| English abstract | The nature of gold species in Au/CeX Zr1−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 Au0 species were found in the catalysts |
| Disciplines: | Física y astronomía, Ingeniería, Química |
| Keyword: | Física de materia condensada, Ingeniería de materiales, Fisicoquímica y química teórica, Catalizadores, Oro, Espectroscopía |
| Keyword: | Physics and astronomy, Engineering, Chemistry, Condensed matter physics, Materials engineering, Physical and theoretical chemistry, Catalysts, Gold, Spectroscopy |
| Full text: | Texto completo (Ver PDF) |
