| 摘要 |
An object of the present invention is to provide a method for producing a noble metal-containing heat-resistant oxide having excellent durability under a high temperature atmosphere According to the method for producing a noble metal-containing heat-resistant oxide of the present invention, a coordination element material containing coordination elements is blended and the obtained first precursor composition is subjected to a first heat treatment to form a first heat-treated composition (crystal lattice) such as a perovskite-type composite oxide or a fluorite-type composite oxide. Then, a noble metal element material containing a noble metal element such as Pt, Rh or Pd is blended with the first heat-treated composition and the secondary precursor composition thus obtained is subjected to a second heat treatment (baking) at a temperature which is higher than that of the first heat treatment and is 600° C. or higher.
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