Exhaust gas purification catalytic material and method for fabricating the same
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United States of America Patent
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Mar 11, 2008
Grant Date -
Jun 2, 2005
app pub date -
Nov 10, 2004
filing date -
Dec 1, 2003
priority date (Note) -
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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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