| 摘要 |
This exhaust gas purification catalyst contains an oxide (1) and an oxide (2). The catalyst has pores (P1-260) having a pore diameter of 1-260nm, measurable by the nitrogen adsorption method, and the sum ΣPV1-260 of the pore volumes (PV1-260) of the pores is 0.79cm3/g or greater. Oxide 1 has an oxygen releasing capacity. Oxide (2) is represented by LaxM1-xM'O3-5 ... (2) (In the formula, M is at least one element selected from the group consisting of Ba, Sr and Ca, M' is at least one element selected from the group consisting of Fe, Co, Ni and Mn, δ represents the amount of oxygen deficiency, x satisfies 0 ≦ x ≦ 1 and δ satisfies 0 ≦ δ ≦ 1.). |
