Purification catalyst for exhaust gas

Details Purification catalyst for exhaust gas Purification catalyst for exhaust gas

2005-03-07

2008-03-04

Nguyen, Cam N. (Department: 1754)

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

Catalyst or precursor therefor

Metal, metal oxide or metal hydroxide

C502S339000, C502S353000, C502S439000, C502S525000

Reexamination Certificate

active

07338917

ABSTRACT:
A purification catalyst for exhaust gas enhances the activity for each precious metal by effectively utilizing the precious metal without incurring a high production cost, thereby improving endurance. The purification catalyst for exhaust gas comprises a composite oxide supporting Pd, the composite oxide has a rational formula MXO3in which M is an alkali metal element and X is an element in group 5 in periodic table, and a perovskite crystal structure.

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