Exhaust gas purification catalyst and oxygen storage...

Details Exhaust gas purification catalyst and oxygen storage... Exhaust gas purification catalyst and oxygen storage...

2007-12-11

2007-12-11

Nguyen, Cam N. (Department: 1754)

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

Catalyst or precursor therefor

Metal, metal oxide or metal hydroxide

C502S302000, C502S327000, C502S332000, C502S333000, C502S334000, C502S339000, C502S349000, C502S439000

Reexamination Certificate

active

11200305

ABSTRACT:
In an exhaust gas purification catalyst comprising a honeycomb support and a catalytic layer that is formed on wall surfaces of each cell of the honeycomb support and contains active alumina and a mixed oxide containing Ce, Zr and Nd and doped with catalytic precious metal, the mixed oxide has a CeO2/ZrO2mass ratio of 1.4 or more and the ratio of Nd2O3/(CeO2+ZrO2+Nd2O3) in the mixed oxide is 20 mass % or less.

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