Patent ID: 8361925

Claim:
An exhaust gas-purifying catalyst, comprising: at least one of a first composite oxide represented by formula A(Al 2-x B x )O 4 and a second composite oxide represented by a formula (Al 2-y C y )O 3 ; and a third composite oxide represented by a formula D i O j .p(E 2-z Fe z O 3 ), wherein element A is a divalent transition metal other than platinum-group elements, each of elements B and C is a transition metal other than platinum-group elements, element D is at least one element selected from the group consisting of a monovalent element, a divalent element and a rare-earth element, element E is aluminum or a combination of aluminum and a transition metal, x satisfies 0<x<2, y satisfies 0<y<2, i and j are numbers that satisfy ki=2j when the valence of the element D is k, p satisfies 1≦p≦6, and z satisfies 0≦z≦2.