Exhaust gas purification catalyst
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United States of America Patent
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Apr 6, 2010
Grant Date -
May 24, 2007
app pub date -
Nov 2, 2006
filing date -
Nov 22, 2005
priority date (Note) -
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Abstract
An exhaust gas purification catalyst comprises: an oxygen storage component constituted by a mixed oxide containing cerium and zirconium; and a catalytic metal carried on the oxygen storage component. The oxygen storage component is in the form of hollow secondary particles each formed so that primary particles of an average particle size of less than 10 nm cohere into a shell.
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