EXHAUST GAS-PURIFYING CATALYST AND METHOD OF PRODUCING SAME
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United States of America Patent
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app pub date -
Oct 14, 2011
filing date -
Apr 14, 2009
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Abstract
The exhaust gas-purifying catalyst includes a first oxide particle with an oxygen storage capacity, one or more second oxide particles partially or entirely covering a surface of the first oxide particle and having an oxygen storage capacity lower than that of the first oxide particle, an average particle diameter Dav of the one or more second oxide particles being smaller than that of the first oxide particle, and precious metal particles supported on at least one of the second oxide particle.
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