CATALYTIC METAL-DEPOSITED OXYGEN STORAGE MATERIAL, METHOD FOR MANUFACTURING THE SAME AND CATALYST USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide an oxygen storage material in which Pd is deposited on a Ce-Zr composite oxide and which has excellent oxygen releasability and high catalytic activity even after exposed to high-temperature gas though the deposited amount of Pd is vary small.

SOLUTION: A most of Pd particles 2 are deposited in recessed parts 4 on the surface of a primary particle 3 of a Ce-Zr compound oxide particle 1 or among primary particles.

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