Purification catalyst for exhaust gas, production method therefor, and purification catalyst devic

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Pd-based composite oxide containing at least one element selected from rare earth metals is used. Therefore, a composite oxide having the same amount of noble metal as in a conventional technique can be burned at a lower temperature. As a result, a purification catalyst for exhaust gas having superior purification properties in which deterioration of Pd dispersion by crystallization is prevented, and a production method therefor can be provided.