Manganese containing oxygen storage component comprising three-way catalyst composition
AssigneeJohnson Matthey Public Limited Company
InventorsJanet Mary Fisher, Timothy Ian Hyde, David Thompsett
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Abstract
A three-way catalyst (TWC) composition comprises a manganese-containing oxygen storage component (OSC) and at least one optionally doped alumina wherein where the at least one alumina is gamma-alumina it is doped with at least one of a rare earth metal, silicon, germanium, phosphorus, arsenic, calcium, strontium or barium.
Claims20
A three-way catalyst (TWC) composition comprising an oxygen storage component (OSC), at least one platinum group metal and at least one alumina, wherein in the event that the at least one alumina comprises gamma-alumina, the gamma-alumina is doped with at least one of a rare earth metal, silicon, germanium, phosphorus, arsenic, calcium, strontium or barium, and wherein the OSC comprises manganese supported on a support selected from the group consisting of a manganese aluminate (Mn2AlO4) support, a scandium aluminate support, a titanium aluminate support, a vanadium aluminate support, a chromium aluminate support, an iron aluminate support, a cobalt aluminate support, a nickel aluminate, a copper aluminate support, a zinc aluminate support and an aluminate support containing two or more first row transition elements.
Dependencies are inferred from the claim text.