EXHAUST GAS PURIFICATION CATALYST

摘要

An exhaust gas-purifying catalyst which offers high exhaust gas purification performance is achieved. The exhaust gas-purifying catalyst includes at least one of a first composite oxide represented by a 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 , 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, x satisfies 0 < x < 2, and y satisfies 0 < y < 2.