Catalyst – solid sorbent – or support therefor: product or process – Catalyst or precursor therefor – Metal – metal oxide or metal hydroxide
Reexamination Certificate
2004-11-10
2008-03-11
Nguyen, Cam N. (Department: 1793)
Catalyst, solid sorbent, or support therefor: product or process
Catalyst or precursor therefor
Metal, metal oxide or metal hydroxide
C502S304000, C502S333000, C502S334000, C502S339000, C502S349000
Reexamination Certificate
active
07341975
ABSTRACT:
The present invention relates to an exhaust gas purification catalytic material containing: (a) a mixed oxide containing Ce and Zr for storing and releasing oxygen; and (b) a precious metal catalyst made of one or more kinds of precious metals. The precious metal catalyst comprises a first precious metal catalyst component placed between atoms, at crystal lattice points and/or at oxygen defect sites of the mixed oxide and a second precious metal catalyst component loaded on the surface of the mixed oxide, thereby improving the thermal resistance, oxygen storage capacity and exhaust gas conversion performance of the catalytic material.
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Akamine Masaaki
Iwakuni Hideharu
Miyoshi Seiji
Murakami Yuki
Takami Akihide
Brooks & Kushman P.C.
Mazda Motor Corporation
Nguyen Cam N.
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