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- Title
Catalytic Performance of Ceria Nanorods in Liquid-Phase Oxidations of Hydrocarbons with tert-Butyl Hydroperoxide.
- Authors
Macedo, Andreia G.; Fernandes, Sílvia E. M.; Valente, Anabela A.; Ferreira, Rute A.; Carlos, Luís D.; Rocha, João
- Abstract
The CeO2 nanorods (CeNR) promote the oxidation of ethylbenzene (PhEt) and cyclohexene with t-BuOOH, at temperatures as low as 55 °C. For both substrates the saturated C-H bonds are preferentially activated over the unsaturated ones. The catalyst seems fairly stable towards leaching phenomena. The liquid-phase oxidation catalysis may be associated with the Ce3+/Ce4+ inter-conversion in the one-electron redox processes mediating the formation of tert-butyl-(per)oxy radicals. CeNR is very effective in H2O2 disproportionation. Pre-treatment of CeNR with H2O2 or t-BuOOH prior to the catalytic reaction enhances the reaction rate of PhEt with t-BuOOH in comparison to CeNR. Textural characterization and spectroscopic studies suggest that catalytic activation is associated to defect sites.
- Subjects
CERIUM oxides; NANORODS; OXIDATION; ETHYLBENZENE; LEACHING; OXIDATION-reduction reaction
- Publication
Molecules, 2010, Vol 15, Issue 2, p747
- ISSN
1420-3049
- Publication type
Article
- DOI
10.3390/molecules15020747