EXHAUST GAS PURIFYING CATALYST AND MANUFACTURING METHOD THEREOF

文件类型：PDF文档
文件大小：614K
PROBLEM TO BE SOLVED : To maintain activity enhancement effect of the noble metal particles without increasing manufacturing costs or environmental impacts. SOLUTION : An exhaust gas purifying catalyst comprises : noble metal particles 1; a first compound 2 which contacts the noble metal particles 1 and suppresses movement of the noble metal particles 1; and a second compound 3 which incorporates the noble metal particles 1 and the first compound 2, suppresses the movement of the noble metal particles 1, and suppresses the coagulation of the first compound 2 following mutual contact of the first compound 2, wherein the first compound 2 supports the noble metal particles 1, and a single body or aggregate of the first compound 2 which supports the noble metal particles 1 is included in a section partitioned by the second compound 3. The first compound 2 is a composite containing a rare earth element and zirconium. The content of zirconium is larger than that of the rare earth element, in the first compound 2. COPYRIGHT : (C)2012, JPO&INPIT