Cerium oxide-zirconium oxide-based mixed oxide and method for producing the same
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United States of America Patent
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Issued Date -
Jan 10, 2008
app pub date -
Jun 28, 2007
filing date -
Jun 30, 2006
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Abandoned
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Abstract
The present invention provides a cerium oxide-zirconium oxide-based mixed oxide having superior platinum dispersibility and a suitable OSC, and a simple production process thereof. The cerium oxide-zirconium oxide-based mixed oxide comprises cerium oxide and zirconium oxide, wherein (1) the weight ratio of CeO.sub.2: ZrO.sub.2 is 60:40 to 90:10, and (2) the cerium oxide and the zirconium oxide are present as a mixture, the zirconium oxide being composed of a solid solution in which tetragonal or cubic zirconium oxide contains cerium.
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