Patent ID: 7576032
Filing Date: 2009-08-18
Classification: B01D,B01J,B82Y,C01G,C01P,Y02T

Abstract:
1. A catalyst composition comprising a perovskite-type composite oxide represented by the following general formula (1): wherein A represents at least one element selected from the group consisting of alkaline earth metals; A′ represents at least one element selected from the group consisting of rare earth elements; B represents Ti; B′ represents at least one element selected from the group consisting of transition elements (excluding rare earth elements, Ti, Rh, and Pt) and Al; N represents at least one element selected from the group consisting of Rh and Pt; x represents an atomic ratio satisfying the following condition: 0≦x≦0.4; y represents an atomic ratio satisfying the following condition: 0≦y<0.5; z represents an atomic ratio satisfying the following condition: 0<z≦0.5; and x represents 0 when N represents Pt alone; wherein A represents at least one element selected from the group consisting of Ca, Sr, and Ba in the general formula (1); and wherein y represents 0 in the general formula (1).