Oxygen Storage Capacity on Cerium Oxide - Precious Metal System

Paper #:
  • 970464

Published:
  • 1997-02-24
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.
Pages:
10
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.
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