Departmental Papers (CBE)
Document Type
Technical Report
Date of this Version
1997
Publication Source
Catalyst Materials for High-Temperature Processes
Start Page
113
Last Page
118
Abstract
Transition metal catalysts such as Rh/Pt used in a three-way automotive catalytic converter have to perform reduction and oxidation functions at the same time. This can be accomplished only in a specific range of oxygen pressure and temperature. In order to maintain a constant partial pressure of oxygen in the vicinity of catalysts mixtures of ceria and zirconia are used. Ceria is an essential component due to its capability of storing oxygen under oxidizing and releasing oxygen under reducing conditions. However, this function deteriorates with time and eventually a catalytic converter stops working properly. It is not well understood why this particular mixture of oxides can achieve the role as a oxygen buffer and why its lifetime is limited. In order to address this issue and to understand the structural interplay at the ceria/zirconia interface, we studied the atomic structure of ultra-thin ceria layers deposited on single crystals of (001) oriented Y-stabilized zirconia (YSZ), in situ, during annealing in air using the synchrotron x-ray surface diffraction technique.
Copyright/Permission Statement
© 1997 The American Ceramic Society.
Recommended Citation
Dmowski, W., Putna, S., Gorte, R. J., Vohs, J. M., & Egami, T. (1997). Ultra-Thin CeO2 Overlayer on YSZ Studied by X-Ray Surface Scattering. Catalyst Materials for High-Temperature Processes, 113-118. Retrieved from https://repository.upenn.edu/cbe_papers/180
Included in
Automotive Engineering Commons, Biochemical and Biomolecular Engineering Commons, Catalysis and Reaction Engineering Commons, Ceramic Materials Commons
Date Posted: 20 December 2017
Comments
The volume in which this report appeared no. 73 in a larger series known as Ceramic Transactions.