Catalyst coatings incorporating binder compositions
Disclosed in certain implementations is a catalysis composition that includes a metal catalyst and a support material impregnated with the metal catalyst.
1. A catalysis composition comprising:
a manganese oxide catalyst, wherein at least 50% of the manganese oxide catalyst is in amorphous form;
a support material impregnated with the manganese oxide catalyst;
a first binder; and
a second binder, wherein,
a coating of the catalysis composition on a substrate exhibits an ultrasonic washcoat adhesion weight loss of less than 1.60%, wherein
the support material is selected from a group consisting of ceria, lanthana, alumina, titania, silica, zirconia, carbons, metal organic framework, clay, zeolites, and combinations thereof;
wherein a cumulative pore volume of the catalysis composition is from about 0.80 mL/g to about 2.0 mL/g, an average pore radius of the catalysis composition is from about 6 nanometers to about 15 nanometers and a surface area of the catalysis composition is from about 100 m 2 /g to about 200 m 2 /g;
wherein the manganese oxide catalyst is impregnated in the support material in an amount ranging from about 10% to about 25% metal atoms by mass, based on the total composition;
the weight loss is weight difference of the coated substrate after being immersed in deionized water and exposed to ultrasonic waves at 25 kHz and 500 Watts for 5 minutes and dried at 90° C., and
wherein the first binder has a first glass transition temperature ranging from about 5° C. to about 20° C., and wherein the second binder has a second glass transition temperature that is greater than the first glass transition temperature; or
wherein the first binder has a first glass transition temperature ranging from about 70° C. to about 90° C., and wherein the second binder has a second glass transition temperature that is less than the first glass transition temperature.
2. The catalysis composition of claim 1 , wherein the ultrasonic washcoat adhesion weight loss of the substrate is less than about 1.30%.
3. The catalysis composition of claim 1 , wherein the ultrasonic washcoat adhesion weight loss of the substrate is less than about 1.15%.
4. The catalysis composition of claim 1 , wherein a mass ratio of the first binder to the second binder ranges from about 0.75 to about 1.25.
5. The catalysis composition of claim 1 , wherein at least one of the first binder or second binder is a styrene acrylic binder.
6. The catalysis composition of claim 1 , wherein the first binder has a first glass transition temperature ranging from about 5° C. to about 20° C., and wherein the second binder has a second glass transition temperature that is greater than the first glass transition temperature.
7. The catalysis composition of claim 1 , wherein the first binder has a first glass transition temperature ranging from about 8° C. to about 15° C., and wherein the second binder has a second glass transition temperature that is greater than the first glass transition temperature.
8. The catalysis composition of claim 1 , wherein the first binder has a first glass transition temperature ranging from about 70° C. to about 90° C., and wherein the second binder has a second glass transition temperature that is less than the first glass transition temperature.
9. The catalysis composition of claim 1 , wherein the first binder has a first glass transition temperature ranging from about 75° C. to about 85° C., and wherein the second binder has a second glass transition temperature that is less than the first glass transition temperature.
10. The catalysis composition of claim 1 , wherein the first binder has a first glass transition temperature ranging from about 5° C. to about 20° C., and wherein the second binder has a second glass transition temperature ranging from about 70° C. to about 90° C.
11. The catalysis composition of claim 1 , wherein the first binder has a first glass transition temperature ranging from about 8° C. to about 15° C., and wherein the second binder has a second glass transition temperature ranging from about 75° C. to about 85° C.
12. The catalysis composition of claim 1 , wherein a first mass percent of the first binder within the catalysis composition is between about 4% and about 8%, and wherein a second mass percent of the second binder within the catalysis composition is between about 4% and about 8%.
13. The catalysis composition of claim 1 , wherein the support material comprises alumina.
14. The catalysis composition of claim 1 , wherein a surface area of the catalysis composition is from about 160 m 2 /g to about 200 m 2 /g.
15. The catalysis composition of claim 1 , wherein the manganese oxide catalyst is impregnated in the support material such that at least about 15% of a total number of metal atoms in the catalysis composition are detectable by surface x-ray photoelectron spectroscopy (XPS).
16. The catalysis composition of claim 1 , wherein a cumulative pore volume of the catalysis composition is from about 0.85 mL/g to about 2.0 mL/g.
17. The catalysis composition of claim 1 , wherein the manganese oxide catalyst comprises manganese oxide crystallites.
18. The catalysis composition of claim 1 , wherein the catalysis composition, when coated onto an automobile radiator, has a deactivation factor of at least 0.7, wherein the deactivation factor is the ratio of aged catalyst % ozone conversion to fresh catalyst % ozone conversion, wherein the aged % conversion is after exposure of the coated radiator to the equivalent of 150,000 miles driving time.
19. The catalysis composition of claim 1 , wherein the support material is selected from a group consisting of alumina, silica, and combinations thereof.
20. The catalyst composition of claim 1 , wherein at least 60% of the manganese oxide catalyst is in amorphous form.
21. The catalyst composition of claim 1 , wherein at least 75% of the manganese oxide catalyst is in amorphous form.
22. The catalyst composition of claim 1 , wherein at least 85% of the manganese oxide catalyst is in amorphous form.
23. A catalysis device comprising:
an automobile component; and
the catalysis composition of claim 1 , wherein the catalysis composition is coated onto the automobile component.
24. A method of preparing a catalysis device of claim 23 , comprising:
providing a slurry of the catalysis composition, and
coating the slurry onto the automobile component to produce a catalyst layer, wherein, after coating the slurry onto the component, an ultrasonic washcoat adhesion weight loss of the substrate is less than 1.60%, wherein
the weight loss is weight difference of the coated component after being immersed in deionized water and exposed to ultrasonic waves at 25 kHz and 500 Watts for 5 minutes and dried at 90° C.
25. The method of claim 24 , wherein coating the slurry onto the component comprises drying the slurry at a temperature ranging from about 80° C. to about 120° C. to produce the catalyst layer.
26. The method of claim 24 , wherein at least one of the first binder or the second binder is a styrene acrylic binder.