Diesel oxidation catalysts

Details Diesel oxidation catalysts Diesel oxidation catalysts

2010-08-06

2011-12-20

Nguyen, Cam N. (Department: 1736)

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Metal, metal oxide or metal hydroxide

C502S185000, C502S304000, C502S327000, C502S328000, C502S332000, C502S333000, C502S334000, C502S349000, C502S415000, C502S439000, C420S082000, C420S465000, C429S524000, C429S525000, C429S532000, C429S533000, C977S773000, C977S810000

Reexamination Certificate

active

08080495

ABSTRACT:
A catalyst composition comprises a particulate support and catalyst nanoparticles on the particulate support. The catalyst nanoparticles comprise an alloy of platinum and palladium in an atomic ratio of from about 25:75 to about 75:25 and are present in a concentration of between about 3 and about 10 wt % weight percent of the catalyst composition. The catalyst composition has an X-ray diffraction pattern that is substantially free of the (311) diffraction peak assignable to PtxPd1-x, where 0.25≦x≦0.75.

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