Catalytic Material And Catalyst For Purifying Exhaust Gas Component

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Disclosed is a catalytic material for purifying an exhaust gas component. The catalytic material comprises a composite oxide which contains, as essential components, zirconium (Zr) and neodymium (Nd), and further contains a rare-earth metal R other than cerium (Ce) and neodymium (Nd), wherein each of the zirconium, neodymium and rare-earth metal R constituting the composite oxide is contained, in the form of oxide, in such a manner that a ratio of Nd 2 O 3 / (ZrO 2 + Nd 2 O 3 + RO) is 3 mol% or more, and a ratio of (Nd 2 O 3 + RO) / (ZrO 2 + Nd 2 O 3 + RO) is 33 mol% or less. The catalytic material of the present invention can oxidize/burn PM in a short period of time, while suppressing CO emission during the burning of the PM, and can achieve further enhanced NOx conversion performance.