Exhaust gas purifying catalyst and method of producing the same

Details Exhaust gas purifying catalyst and method of producing the same Exhaust gas purifying catalyst and method of producing the same

2011-07-12

2011-07-12

Hendrickson, Stuart (Department: 1736)

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

Catalyst or precursor therefor

Metal, metal oxide or metal hydroxide

C502S303000, C502S304000, C427S380000

Reexamination Certificate

active

07977276

ABSTRACT:
Disclosed is an exhaust gas purifying catalyst exhibiting excellent purification performance for a long period of time by suppressing coagulation of a noble metal. A catalyst powder comprises a noble metal and first and second compounds. In the catalyst powder, the first compound carries the noble metal and is separated from another first compound carrying a noble metal by the second compound. At least one catalyst layer comprising the catalyst powder is formed on an inner surface of a substrate. The catalyst layer has fine pores. A fine pore volume of fine pores having a fine pore diameter of greater than 0.1 μm to less than or equal to 1 μm is 10% to 60% of the fine pore volume of fine pores having a pore diameter of 1.0 μm or less.

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