Fundamental Studies of the Interaction of Pd and Rh Particles with Ceria and Ceria-Zirconia Surfaces in Model Planar atalysts
EMSL Project ID
40121
Abstract
Ceria and ceria-based oxides have been widely investigated as electronic promoters of activity, selectivity, and thermal stability in a variety of catalysts. Pd on ceria-based supports is an important catalyst system for a variety of applications, including the catalytic combustion of methane, diesel oxidation, and water gas shift reactions. Perhaps the most significant application of ceria, however, is in automotive three-way catalysts (TWCs), where it serves as a multi-functional support for Pd as well as Pt and Rh. While research and development efforts over many years have led to a number of advances, catalyst deactivation (due to metal particle growth, agglomeration, and encapsulation, for example) remains a major problem, and there is significant opportunity for mechanistic studies to yield new and useful insight in this area. Moreover, metal-support interactions play a major role in TWCs and heterogeneous catalysts in general, sometimes affecting catalytic performance dramatically. The overall objective of this work is thus to develop a better understanding of fundamental interactions between Pd and Rh metal particles and ceria-based supports. This information would be useful in the further development of TWCs and a variety of other catalytic and energy applications. EMSL is a leading facility for the fabrication of high-quality ceria-based supports for this research.
Project Details
Project type
Large-Scale EMSL Research
Start Date
2010-11-04
End Date
2011-09-30
Status
Closed
Released Data Link
Team
Principal Investigator
Team Members