| 摘要 |
PURPOSE:To obtain a catalyst composition generating no lowering of catalytic activity even in a high temp. reductive atmosphere of 500 deg.C or higher and having excellent durability. CONSTITUTION:A catalyst composition excellent in durability is obtained by preparing a composition consisting of perovskite composite oxide containing a rare-earth element, rare-earth oxide and one or more kind of a component among rare-earth oxide, zirconium oxide, aluminum oxide, ruthenium oxide, oxide of one or more kinds of calcium and barium and a noble metal. |
