Department of Chemistry
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.
Applied Catalysis A: General
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Ceria–zirconia–yttria solid solution, Nanoparticle, Supported chromia catalyst, Isobutane oxidative dehydrogenation
Wang, Guozhi, Hongxing Dai, Lei Zhang, Jiguang Deng, Caixin Liu, Hong He, and Chak-Tong Au. "CrOx/nano-Ce0.60Zr0.35Y0.05O2 catalysts that are highly selective for the oxidative dehydrogenation of isobutane to isobutene." Applied Catalysis A: General 375.2 (2010): 272-278.