Oxygen Storage Capacity on Cerium Oxide - Precious Metal System

970464

02/24/1997

Event
International Congress & Exposition
Authors Abstract
Content
Cerium oxide (CeO2) is known to have good oxygen storage capacity (OSC) and is used widely in three-way catalysts for automobiles, but it has a problem of inferior heat stability.
In our previous work, cerium-zirconiumyttrium (Ce Zr-Y) oxide systems were investigated with the aim of improving the heat stability of CeO2-based oxide systems, and we found an optimum composition of Ce-Zr-Y oxide with platinum (Pt) showed good OSC even after high temperature aging.
In this study OSC and thermal stability of Ce-Zr-Y oxide with varying the types of precious metals were investigated to evaluate the effect of precious metals.
The results show that, Palladium (Pd) and Rhodium (Rh) are also available for Ce-Zr-Y oxide with precious metal system to improve OSC after thermal aging. In particular, Rh exhibited higher improvement than others at the composition of lower Ce content.
Meta TagsDetails
DOI
https://doi.org/10.4271/970464
Pages
10
Citation
Yamada, K., Tanaka, H., and Yamamoto, M., "Oxygen Storage Capacity on Cerium Oxide - Precious Metal System," SAE Technical Paper 970464, 1997, https://doi.org/10.4271/970464.
Additional Details
Publisher
Published
Feb 24, 1997
Product Code
970464
Content Type
Technical Paper
Language
English