CATALYST CARRIER FOR EXHAUST GAS PURIFICATION, CATALYST FOR EXHAUST GAS PURIFICATION, AND CATALYST PRODUCT FOR EXHAUST GAS PURIFICATION

摘要

PROBLEM TO BE SOLVED: To provide an exhaust gas purification catalyst which suppresses reduction in NO_X removal activity in a lean region where an excess air ratio λ is greater than 1, and exhibits remarkably improved performance compared to a Rh-supporting zirconia.;SOLUTION: An exhaust gas purification catalyst carrier includes a phosphate salt represented by the general formula MPO₄ (where M represents Y, La, or Al), or a zirconium phosphate represented by the formula ZrP₂O₇. An exhaust gas purification catalyst contains a noble metal at least containing Rh and supported on the carrier. An exhaust gas purification catalyst product has a catalyst support made of a ceramic or metallic material, and a layer of the exhaust gas purification catalyst supported on the catalyst support.;SELECTED DRAWING: None;COPYRIGHT: (C)2016,JPO&INPIT