Exhaust treatment device, and methods of making the same

Details Exhaust treatment device, and methods of making the same Exhaust treatment device, and methods of making the same

2011-01-25

2011-01-25

Neckel, Alexa D (Department: 1723)

Chemical apparatus and process disinfecting, deodorizing, preser

Chemical reactor

Waste gas purifier

C422S168000, C502S302000, C502S304000, C502S333000, C502S339000

Reexamination Certificate

active

07875250

ABSTRACT:
An exhaust treatment device, comprises a substrate; a catalyst layer deposited on the substrate, the catalyst layer comprising a first catalyst metal and a second catalyst metal, wherein greater than or equal to about 70 wt % of the first catalyst metal and the second catalyst metal is non-alloyed under alloying conditions, wherein the weight percent is based on a combined weight of the first catalyst metal and the second catalyst metal. The first catalyst metal and the second catalyst metal are different and may be individually selected from the group consisting of platinum, palladium, rhodium, rhenium, iridium, ruthenium, and osmium.

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“Impact of Pt-Rh and Pd-Rh Interactions on Performance of Bimetal Catalysts”, J.C. Nunan, et al., SAE Technical Paper Series, 950258; Internation Congress and Exposition, Detroit, MI, Feb. 27-Mar. 2, 1995, 9 pages.
WO 03/074172 A1 International Publication.

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