Three-way rare earth oxide catalyst
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United States of America Patent
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May 27, 2003
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Feb 2, 2000
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Feb 2, 2000
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Abstract
The invention is a method of manufacturing a three-way catalyst and the catalyst as well as its use for treating exhaust gas generated by a gasoline internal combustion engine. The catalyst composition comprises a mixture of particles of three different materials. More specifically, it includes a mixture of calcined ceria/zirconia particles impregnated with platinum together with palladium, other calcined ceria/zirconia particles impregnated with only rhodium precious metal, and alumina particles not impregnated with precious metal.
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