METAL PROMOTED PALLADIUM AND/OR PLATINUM-CONTAINING CATALYSTS FOR GASOLINE ENGINE EXHAUST GAS TREATMENTS
A three-way catalyst article, and its use in an exhaust system for internal combustion engines, is disclosed. The catalyst article for treating exhaust gas comprising: a substrate comprising an inlet end and an outlet end with an axial length L, a first catalytic region comprising a first platinum group metal (PGM) component and a first metal component, wherein the first PGM component comprises platinum, palladium, or a combination thereof; wherein the first metal component is Mn, Mg, Fe, Cu, Zn, or a combination thereof; and wherein the molar ratio between the first metal component and the first PGM component in the first catalytic region is from 120:1 to 1:5.
1 . A catalytic article for treating exhaust gas comprising:
a substrate comprising an inlet end and an outlet end with an axial length L,
a first catalytic region comprising a first platinum group metal (PGM) component and a first metal component,
wherein the first PGM component comprises platinum, palladium, or a combination thereof; wherein the first metal component is Mn, Mg, Fe, Cu, Zn, or a combination thereof; and
wherein the molar ratio between the first metal component and the first PGM component in the first catalytic region is from 120:1 to 1:5.
2 . The catalytic article of claim 1 , wherein the first catalytic region further comprises a first oxygen storage capacity (OSC) material and/or a first inorganic oxide.
3 . The catalytic article of claim 1 , wherein the first metal component is Mn, Mg, Zn, or a combination thereof.
4 . The catalytic article of claim 1 , wherein the first PGM component comprises platinum.
5 . The catalytic article of claim 4 , wherein the molar ratio between the first metal component and the first PGM component in the first catalytic region is from 100:1 to 1:1.
6 . The catalytic article of claim 4 , wherein the first metal component is Mn.
7 . The catalytic article of claim 6 , wherein the molar ratio between the first metal component and the first PGM component in the first catalytic region is from 50:1 to 1:1.
8 . The catalytic article of claim 4 , wherein the first metal component is Mg.
9 . The catalytic article of claim 8 , wherein the molar ratio between the first metal component and the first PGM component in the first catalytic region is from 100:1 to 5:1.
10 . The catalytic article of claim 4 , wherein the first metal component is Zn.
11 . The catalytic article of claim 10 , wherein the molar ratio between the first metal component and the first PGM component in the first catalytic region is from 20:1 to 1:1.
12 . The catalytic article of claim 4 , wherein the first metal component is Fe and/or Cu.
13 . The catalytic article of claim 12 , wherein the molar ratio between the first metal component and the first PGM component in the first catalytic region is from 40:1 to 5:1.
14 . The catalytic article of claim 1 , wherein the first PGM component comprises palladium.
15 . The catalytic article of claim 14 , wherein the molar ratio between the first metal component and the first PGM component in the first catalytic region is from 20:1 to 1:5.
16 . The catalytic article of claim 14 , wherein the first metal component is Mn.
17 . The catalytic article of claim 16 , wherein the molar ratio between the first metal component and the first PGM component in the first catalytic region is from 20:1 to 1:4.
18 . The catalytic article of claim 14 , wherein the first metal component is Mg.
19 . The catalytic article of claim 18 , wherein the molar ratio between the first metal component and the first PGM component in the first catalytic region is from 20:1 to 1:1.
20 . The catalytic article of claim 14 , wherein the first metal component is Zn.
21 . The catalytic article of claim 20 , wherein the molar ratio between the first metal component and the first PGM component in the first catalytic region is from 10:1 to 1:2.
22 . The catalytic article of claim 14 , wherein the first metal component is Fe and/or Cu.
23 . The catalytic article of claim 22 , wherein the molar ratio between the first metal component and the first PGM component in the first catalytic region is from 10:1 to 1:5.