Support Shape Effect in
Metal Oxide Catalysis: Ceria-Nanoshape-Supported
Vanadia Catalysts for Oxidative Dehydrogenation of Isobutane
- Publication date
- Publisher
Abstract
The support effect has long been an intriguing topic
in catalysis
research. With the advancement of nanomaterial synthesis, the availability
of faceted oxide nanocrystals provides the opportunity to gain unprecedented
insights into the support effect by employing these well-structured
nanocrystals. In this Letter, we show by utilizing ceria nanoshapes
as supports for vanadium oxide that the shape of the support poses
a profound effect on the catalytic performance of metal oxide catalysts.
Specifically, the activation energy of VO<sub><i>x</i></sub>/CeO<sub>2</sub> catalysts in oxidative dehydrogenation of isobutane
was found to be dependent on the shape of ceria support, rods <
octahedra, closely related to the surface oxygen vacancy formation
energy and the numbe of defects of the two ceria supports with different
crystallographic surface planes