(1) precious metal content is 0.001 - 0.03 in the precious metal content compound

摘要

PROBLEM TO BE SOLVED: To provide complex metal oxide containing an exhaust gas purification catalyst noble metal excellent in heat resistance of the whole pore volume and its manufacturing method.;SOLUTION: The complex metal oxide containing noble metals consisting of zirconium, cerium and noble metal has a whole pore volume after sintering at 1,050°C for 24 hours of 0.25 cc/g or more. It is preferable that the peak is pore diameter of 50-90 nm in micro pore profile based on BJH method, that the whole pore volume is 0.6 cc/g or more.;COPYRIGHT: (C)2006,JPO&NCIPI