| abstract |
In the exhaust gas purification catalyst (10), a metal oxide (1) selected from Ti, Zr, Ce, Nb, Al, Si, and an alkali metal and a zeolite (2) are supported on the base material (3). Has been done. A layer in which a zeolite (2) is supported is formed on both sides of a layer in which a metal oxide (1) is supported on the base material (3), or a zeolite (2) is supported on the base material (3). A three-layer structure is formed by forming a layer on which the metal oxide (1) is supported on both sides of the layer. |