| 摘要 |
PURPOSE:To prevent the deterioration in catalytic performance in high-temp. reaction by forming a carrier layer consisting of zirconia or titania having the grain size of specified range on the surface of molded base material, dispersing and depositing platinum on the carrier layer. CONSTITUTION:A carrier layer contg. the following grains is formed on the surface of molded base material wherein the grains having 0.05-0.5mu grain size of zirconia or titania are contained by at least >=15wt% of all zirconia or titania and the grains having 1.0-10.0mu grain size are contained by at least >=30wt%. Platinum is dispersed and deposited on the carrier layer to form an oxidizing catalytic body. Further, the narrow pore distribution of the catalytic body is 0.01-1.0mu narrow pore range and it is preferable that both the narrow pore volume of 0.01-0.1mu and the narrow pore volume of 0.1-1.0mu are >=5vol% of all narrow pore volume. |
