| 摘要 |
<P>PROBLEM TO BE SOLVED: To disclose an exhaust gas suppressant catalyst that improves catalytic efficiency by increasing gas diffusibility of an exhaust gas in catalytic layers. <P>SOLUTION: The exhaust gas catalyst is one including at least a carrier and a plurality of layers formed on the carrier, and at least one of a plurality of the layers has voids in the layer, at least one of a plurality of the layers is configured by having the voids in the layer, and is configured by including a composite oxide of a noble metal, alumina, ceria and zirconia, and rare earth metals of one kind or two kinds or more excluding ceria as principal components, as the catalytic components. <P>COPYRIGHT: (C)2008,JPO&INPIT |
