Composite oxide for exhaust gas purification catalyst and filter
AssigneesAutoneworks Technologies, Ltd., Summitomo Wiring Systems, Ltd., Sumitomo Electric Industries, Ltd.
InventorsYuki Kaneshiro, Akira Nagatomi
Life of this patent
Estimating the term…
Abstract
A composite oxide for exhaust gas purification catalysts, which comprises Ce, Bi, R and oxygen and satisfies 0<x≦0.4 and 0<y<1.0 when the molar ratio of Ce, Bi and R of the oxide is represented as (1−x−y), x and Y respectively. The composite oxide has an X-ray diffraction peak corresponding to that of a fluorite structure. In the composite oxide, R contains one or two of Pr and Tb. The exhaust gas purification catalyst is favorable for a PM combustion catalyst.
Claims10
A composite oxide for exhaust gas purification catalysts, which comprises Ce, Bi, R (where R is at least one lanthanoid except La and Ce) and oxygen.
A composite oxide for exhaust gas purification catalysts, which comprises Ce, Bi, R (where R is at least one lanthanoid except La and Ce), Zr and oxygen.
A composite oxide for exhaust gas purification catalysts, which comprises Ce, Bi, R (where R is at least one lanthanoid except La and Ce) and oxygen, and satisfies 0<x≦0.4 and 0<y<1.0 when the molar ratio of Ce, Bi and R of-the-oxide is represented as (1−x−y), x and Y respectively.
A composite oxide for exhaust gas purification catalysts, which comprises Ce, Bi, R (where R is at least one lanthanoid except La and Ce), Zr and oxygen, and satisfies 0<x≦0.4, 0<y<1.0 and 0<z≦0.5 when the molar ratio of Ce, Bi, R and Zr is represented as (1−x−y−z), x, y, and z respectively.
Dependencies are inferred from the claim text.