| Autor: |
Perkas, Nina, Rotter, Hadar, Vradman, Leonid, V. Landau, Miron, Gedanken, Aharon |
| Zdroj: |
Langmuir; August 2006, Vol. 22 Issue: 16 p7072-7077, 6p |
| Abstrakt: |
Highly dispersed Pt nanoparticles were incorporated in CeO2nanopowders by an ultrasound-assisted reduction procedure. The activity of the Pt/CeO2catalysts was studied in the reaction of the ethyl acetate combustion, and complete conversion was achieved at low temperature. It was demonstrated that the higher dispersion of the CeO2support, the better the performance of the Pt/CeO2catalysts. The catalysts were characterized by XRD, TEM, HRTEM, EDX, BET, and XPS. The homogeneous incorporation of 2−4 nm Pt nanoparticles into the interparticle distance of the CeO2nanopowders was demonstrated. The advantage of the sonochemical method for catalyst preparation, in comparison with the traditional incipient wetness impregnation, was explained as the result of the homogeneity and better dispersion of the active metal phase obtained by ultrasound irradiation. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
|
