Abstract
Fluorite-type nanosized Ce0.60Zr0.35Y0.05O2 (nano-CZY) solid solution catalysts that are relatively uniform in particle size (4–5 nm) and y CrOx/nano-CZY (y is the weight percentage of Cr2O3 ranging from 2 to 10 wt%) catalysts were prepared by the ethylene glycol-assisted CTAB-templated co-precipitation and incipient wetness impregnation methods, respectively. The materials were characterized by a number of analytical techniques and their catalytic performance was evaluated for the oxidative dehydrogenation of isobutane. The y CrOx/nano-CZY catalysts show excellent activities, with the y = 8 wt% one performing the best (ca. 93% isobutene selectivity and ca. 10% isobutene yield at 540 °C and 30,000 mL/(gcat h)). We conclude that the good reducibility of the highly dispersed CrOx domains and the promotion of O2 adsorption at oxygen vacancies of nano-CZY (for enhanced oxidation of the reduced catalyst) are responsible for the excellent performance of the 8 wt% CrOx/nano-CZY catalyst.
Original language | English |
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Pages (from-to) | 272-278 |
Number of pages | 7 |
Journal | Applied Catalysis A: General |
Volume | 375 |
Issue number | 2 |
Early online date | 11 Jan 2010 |
DOIs | |
Publication status | Published - Mar 2010 |
User-Defined Keywords
- Ceria-zirconia-yttria solid solution
- Isobutane oxidative dehydrogenation
- Nanoparticle
- Supported chromia catalyst