Automotive catalyst composites having a two-metal layer

US9266092B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Mirko Arnold · Bedminster, US
• Stefan Kotrel · Bedminster, US
• Attilio Siani · Shanghai, CN
• Stephan Siemund · Pattensen, DE
• Thomas Schmitz · Wesseling, DE
• Burkhard Rabe · Husum, DE
• Gary A. Gramiccioni · Flemington, US
• Oliver Seel · Nienburg/Weser, DE
• Torsten Neubauer · Langenhagen, DE
• Knut Wassermann · Princeton, US

Key dates

• Filing date: Jan 17, 2014
• Grant date: Feb 23, 2016
• Expiry date: Jan 17, 2034

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T10/12
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Provided are catalyst composites whose catalytic material is effective to substantially simultaneously oxidize carbon monoxide and hydrocarbons and reduce nitrogen oxides. The catalyst composites have a two-metal layer on a carrier, the two-metal layer comprising a rhodium component supported by a first support comprising a refractory metal oxide component or a first ceria-zirconia composite; a palladium component supported by a second support comprising a second ceria-zirconia composite; one or more of a promoter, stabilizer, or binder; wherein the amount of the total of the first and second ceria-zirconia composites in the two-metal layer is equal to or greater than the amount of the refractory metal oxide component. Methods of making and using the same are also provided.