This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Oxygen Storage Capacity on Cerium Oxide - Precious Metal System
Annotation ability available
Sector:
Language:
English
Abstract
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.
Recommended Content
Authors
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.Also In
References
- Tanaka H. Fujikawa H. Takahashi I. “Perovskite-Pd Three-Way Catalysts for Automotive Applications” SAE Paper 930251 1993
- Tanaka H. Fujikawa H. Takahashi I. “Excellent Oxygen Storage Capacity of Perovskite Pd Three-Way Catalysts” SAE Paper 950256 1995
- Kubsh J.E. Rieck J.S. Spencer N.D. “Cerium Oxide Stabilization: Physical Property and Three Way Activity Considerations” Crucq A. Catalysis and Automotive Pollution Control II Elsevier Science Publishers B.V. Amsterdam 125 138 1991
- Diwell A.F. Rajaram R.R. Shaw, H.A Truex T.J. “The Role of Ceria in Three-Way Catalysts” Crucq A. Catalysis and Automotive Pollution Control II Elsevier Science Publishers B.V. Amsterdam 139 152 1991
- Ozawa M. Kimura M. Isogai A. “The Application of Ce-Zr Oxide Solid Solution to Oxygen Storage Promoters in Automotive Catalysts” Jour. Alloys and Comp 193 73 75 1993
- Tanaka H. Yamamoto M. “Improvement in Oxygen Storage Capacity” SAE Paper 960794 1996
- Yamada K. Tanaka H. Matsuura S. Sato Y. “Durability of Three-Way Catalysts with Precious Metals Loaded on Different Location” SAE Paper 960795 1996
- Bernal S. et al. “HREM study of the behavior of a Rh/CeO2 catalyst under high temperature reducing and oxidizing conditions” Catalysis Today 23 219 250 1995