Document Type

Journal Article

Department/Unit

Department of Chemistry

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.

Publication Year

2010

Journal Title

Applied Catalysis A: General

Volume number

375

Issue number

2

Publisher

Elsevier

First Page (page number)

272

Last Page (page number)

278

Referreed

1

DOI

10.1016/j.apcata.2010.01.005

ISSN (print)

0926-860X

Link to Publisher’s Edition

http://dx.doi.org/10.1016/j.apcata.2010.01.005

Keywords

Ceria–zirconia–yttria solid solution, Nanoparticle, Supported chromia catalyst, Isobutane oxidative dehydrogenation

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Chemistry Commons

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