Carrier for exhaust gas purification catalyst and exhaust gas purification catalyst
The invention relates to a catalyst carrier for exhaust gas purification catalyst which contains a metal phosphate containing Zr, and it provides a new catalyst carrier which exhibits excellent NOx purification performance in a high temperature region. The invention proposes a carrier for exhaust gas purification catalyst containing a metal phosphate which has a NASICON type structure and contains Zr.
1. A carrier for exhaust gas purification catalyst comprising a metal phosphate which has a NASICON type structure and contains Zr, wherein the metal phosphate is represented by a formula: MxZr 2 (PO 4 ) 3 (M in the formula includes one or two or more elements selected from a group consisting of Pr, Nd, Y, Ce, Mn, La, and Fe, and x is from 0.25 to 1).
2. An exhaust gas purification catalyst comprising the carrier for exhaust gas purification catalyst according to claim 1 and a catalytically active component.