Santoku Corporation

Cataler Corporation

Shigeru Ono

Tadatoshi Murota

Tomonori Tahara

Satoshi Matsueda

Keiichi Narita

Kyosuke Murakami

Michio Tanaka

A Pd-supporting Zr-based composite oxide wherein by having a Zr-containing composite oxide support and Pd supported thereon and by showing, upon XAFS (X-ray absorption fine structure) analysis, a maximum peak in a Pd bond distance range of 2.500-3.500 &#x212b;, the maximum peak being located in a position of 3.050-3.110 &#x212b;.

Pd-supporting Zr-based composite oxide

Provided are a composite oxide which is suitable as a co-catalyst for an exhaust gas purifying catalyst or the like, has high heat resistance, and has an excellent oxygen absorbing and desorbing capability at low temperatures and a method for producing the composite oxide. The composite oxide contains Ce and Zr, wherein the Ce content is 30 to 80 at % and the Zr content is 20 to 70 at %, based on the total of Ce and Zr being 100 at %, or further contains particular element M, wherein the Ce content is not less than 30 at % and less than 80 at %, the Zr content is not less than 20 at % and less than 70 at %, and the content of element M is more than 0 at % and not more than 15 at %, based on the total of Ce, Zr, and element M being 100 at %.

Composite oxide

Growing community of inventors

Kobe, Japan

Shigeru Ono