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US 7,452,843 B2Granted
Exhaust treatment devices, catalyst, and methods of making and using the same
AssigneeUmicore AG & Co. KG
InventorsWilliam J. LaBarge, Joseph V. Bonadies, Joachim Kupe
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Abstract
In one embodiment, an exhaust treatment device includes: a substrate, a shell disposed around the substrate, and a retention material disposed between the shell and the substrate. The substrate includes a catalyst that includes a precious metal and a solid solution comprising solid solution metals, wherein the solid solution metals include yttrium, zirconium, and titanium.
Claims8
A method of making a catalyst, the method comprising the steps of:
- reacting a titanium salt with an alcohol to form a titanium alkoxide;
- and separately reacting a zirconium salt with an alcohol to form a zirconium alkoxide;
- followed by
- mixing the titanium alkoxide and the zirconium alkoxide in the presence of an organic acid to form an organometallic precursor;
- followed by
- decomposing the organometallic precursor to form a solid solution characterized by a zirconium-titanium oxide;
- and then
- adding a precious metal to the solid solution to form the catalyst.
5 more elements
Dependencies are inferred from the claim text.