Transition metal doped alumina for improved TWC performance
Catalyst compositions, articles, systems and methods related to a three-way-catalyst composition comprising alumina doped with a transition metal.
1. A three-way-catalyst composition comprising alumina doped with a transition metal, wherein the transition metal comprises Ti, Mn, Fe, Cu, Zn, Ni, or combinations thereof; and wherein the transition metal is present in an amount of about 2 wt % to about 8 wt %, relative to the total weight of the doped alumina.
2. The three-way-catalyst composition of claim 1 , wherein the transition metal comprises Mn, Cu, or combinations thereof.
3. The three-way-catalyst composition of claim 1 , comprising a platinum group metal component.
4. The three-way-catalyst composition of claim 3 , wherein the platinum group metal component comprises Pd, Rh, Pt, or combinations thereof.
5. The three-way-catalyst composition of claim 1 , wherein the alumina is La-stabilized alumina.
6. The three-way-catalyst composition of claim 1 , wherein the alumina is present in an amount of about 0.1 wt % to about 10 wt % of the three-way-catalyst composition.
7. The three-way-catalyst composition of claim 1 , further comprising an oxygen storage component (OSC) material.
8. The three-way-catalyst composition of claim 7 , wherein the OSC comprises cerium oxide, zirconium oxide, a ceria-zirconia mixed oxide, an alumina-ceria-zirconia mixed oxide, or combinations thereof.
9. The three-way-catalyst composition of claim 1 , further comprising an alkali or alkaline-earth metal.
10. The three-way-catalyst composition of claim 9 , wherein the alkali or alkaline-earth metal comprises barium, strontium, or combinations thereof.
11. A three-way-catalyst composition comprising alumina doped with a transition metal, wherein the transition metal comprises Ti, Mn, Fe, Cu, Zn, Ni, or combinations thereof; and wherein the alumina is present in an amount of about 0.1 wt % to about 10 wt % of the three-way-catalyst composition.
12. The three-way-catalyst composition of claim 11 , wherein the transition metal comprises Mn, Cu, or combinations thereof.
13. The three-way-catalyst composition of claim 11 , comprising a platinum group metal component.
14. The three-way-catalyst composition of claim 13 , wherein the platinum group metal component comprises Pd, Rh, Pt, or combinations thereof.
15. The three-way-catalyst composition of claim 11 , wherein the alumina is La-stabilized alumina.
16. The three-way-catalyst composition of claim 11 , further comprising an oxygen storage component (OSC) material.
17. The three-way-catalyst composition of claim 16 , wherein the OSC comprises cerium oxide, zirconium oxide, a ceria-zirconia mixed oxide, an alumina-ceria-zirconia mixed oxide, or combinations thereof.
18. The three-way-catalyst composition of claim 11 , further comprising an alkali or alkaline-earth metal.
19. The three-way-catalyst composition of claim 18 , wherein the alkali or alkaline-earth metal comprises barium, strontium, or combinations thereof.