| 简介 |
PROBLEM TO BE SOLVED : To provide an exhaust gas cleaning catalyst excellent in terms of heat resistance and cleaning performance using unprecedentedly and radically economized quantities-in-use of rare earth elements; a method for manufacturing an exhaust gas cleaning catalyst; and an exhaust gas cleaning catalyst component.
SOLUTION : The provided exhaust gas cleaning catalyst includes a mixture consisting of Oxide 1 including a phase of a perovskite structure, bearing a composition expressed by the following formula (1), and having an average particle diameter of 0.2 μm or less and Oxide 2 including at least one type selected from the group consisting of Y2O3, La2O3, CeO2, and NiO, through Y2O3 indispensably, and having an average particle diameter of 0.1 μm or less in a state where the combined sum of Y, La, Ce and Ni of Oxide 2 with respect to A1 of Oxide 1 is 5 mol% or more and 30 mol% or less and where at least one type of noble metal selected from the group consisting of Pd, Pt, and Rh is being included, supported on the mixture of Oxide 1 and Oxide 2 : A1a1{Fe(1-b1-c1)B1b1C1c1}O3-δ (Formula 1) (A1 is one or two types of elements selected from the group consisting of Ba, Sr, and Ca, whereas 1.0≤a1≤1.1 holds).
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