Exhaust gas purifying catalyst and production process thereof

Details Exhaust gas purifying catalyst and production process thereof Exhaust gas purifying catalyst and production process thereof

2005-04-27

2009-12-15

Mayes, Melvin C (Department: 1793)

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

Catalyst or precursor therefor

Metal, metal oxide or metal hydroxide

Reexamination Certificate

active

07632776

ABSTRACT:
The present invention provides an exhaust gas purifying catalyst and a production process thereof. An exhaust gas purifying catalyst of the present invention comprises a metal oxide particle (1, 2) and rhodium (3) supported thereon, the metal oxide particle (1, 2) comprising a core part (1) relatively rich in ceria and a surface layer (2) relatively rich in zirconia.

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