Exhaust gas purification catalyst
AssigneeCataler Corporation
InventorsNoboru Sato, Tomohito Mizukami
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Abstract
The invention provides an exhaust gas purification catalyst comprising one or more catalyst coating layers having platinum and/or palladium with rhodium supported on a carrier, characterized in that the (platinum and/or palladium)/rhodium weight ratio is 1.0 or less.
Claims3
An exhaust gas purification catalyst comprising a carrier base material, and one or more catalyst coating layers formed on the carrier base material and containing a porous oxide carrier and platinum and/or palladium with rhodium, characterized in that the (platinum and/or palladium)/rhodium weight ratio is 1.0 or less.
An exhaust gas purification system provided with an exhaust gas purification catalyst comprising a carrier base material, and one or more catalyst coating layers formed on the carrier base material and containing a porous oxide carrier and a noble metal, wherein when two or more catalyst coating layers are formed on the same carrier base material, the second or more catalyst coating layers in the direction of the exhaust gas flow, or wherein when two or more catalysts are loaded, any catalyst coating layer of the second or more catalysts contains (platinum and/or palladium)/rhodium at a weight ratio of 1.0 or less.
Dependencies are inferred from the claim text.