| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a ternary catalyst for exhaust gas purification having high exhaust gas purification performance, high low-temperature activity, superior stability against heat, and preventing sintering of noble metals, and its production method. <P>SOLUTION: This ternary catalyst for exhaust gas purification comprises a catalyst consisting of noble metal particles with a particle size of 1-20nm, and a promotor component coating film coating the noble metal particles; or the catalyst carried on porous fire-resistant inorganic powder; or those substances carried on a carrier formed from ceramics or a metallic material. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
