Al{sub 2}O{sub 3}/CeO{sub 2} Washcoats for three-way automotive emission catalysts
- Oak Ridge National Lab., TN (United States)
- General Motors, Flint, MI (United States)
Pt-Rh based three-way catalysts are the primary catalytic system for control of hydrocarbon, CO, and NO{sub x} automotive emissions. Mixed Al{sub 2}O{sub 3}/CeO{sub 2} oxides are often dispersed on a cordierite honeycomb monolith as a washcoat and act as a high-surface-area carrier for the heavy metal catalyst clusters. Conversion efficiency and lifetime of a converter is determined by the microstructure of the washcoat/monolith and its evolution during high-temperature exposure to the exhaust gas. SEM, electron microprobe analysis, and analytical electron microscopy were used to study these catalysts before and after engine dynamometer tests, with max monolith temperatures of 1000 and 1150 C.
- Research Organization:
- Oak Ridge National Lab., TN (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 67628
- Report Number(s):
- CONF-950892--6; ON: DE95012894
- Country of Publication:
- United States
- Language:
- English
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