| 摘要 |
PURPOSE:To obtain a catalyst for purification of exhaust gas which is rich in low temp. activity under an excess oxygen atmosphere and exhibits improved activity in a reaction temp. range with the center around a specified temp. CONSTITUTION:One or more metals contg. indispensably Pt and selected from elements of the platinum group and one or more metals selected from transition metals and metals of IIB group are both carried on a metal-contg. silicate. Thereby, each function of each carried metal can be effectively exhibited thereby. |
