Abgasreinigungskatalysator

Details

Veröffentlichungs-Nr.

EP4778626

Anmeldetag

11. September 2024

Veröffentlichung

20. März 2025

Rechtsraum

EP

Abstract

An object of the present invention is to provide an exhaust gas purification catalyst that uses Rh and La in combination and can effectively exhibit the action of La while suppressing a decrease in the exhaust gas purification performance (particularly NOx purification performance) of Rh caused by La, and in order to achieve this object, the present invention provides an exhaust gas purification catalyst (1) including: a substrate (10); a first catalyst layer (20) provided on an upstream side of the substrate (10); and a second catalyst layer (30) provided on a downstream side of the substrate (10), wherein the first catalyst layer (20) includes a lower layer (21) containing Pd and an upper layer (22) containing Rh, wherein the second catalyst layer (30) includes a lower layer (31) containing Pt and an upper layer (32) containing Rh, wherein a content of La in terms of La<2>O<3> in the first catalyst layer (20) is 5% by mass or more based on a mass of the first catalyst layer (20), and wherein a content of La in terms of La<2>O<3> in the second catalyst layer (30) is 3% by mass or less based on a mass of the second catalyst layer (30).

Anmelder

Firma

Mitsui Kinzoku Company, Limited

Land

🇯🇵 Japan