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US 11,691,123 B2Granted
Low-temperature diesel oxidation catalysts using TiO2 nanowire arrays integrated on a monolithic substrate
AssigneeUniversity of Connecticut
InventorsPu-Xian Gao, Son Hoang
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Abstract
Metal oxide nanoarrays, such as titanium oxide nanoarrays, having a platinum group metal dispersed thereon and methods of making such nanoarrays are described. The platinum group metal can be dispersed on the metal oxide nanoarray as single atoms. The nanoarrays can be used to catalyze oxidation of combustion exhaust.
Claims19
A method of making a titanium dioxide nanoarray having a platinum group metal dispersed thereon, the method comprising:
- contacting a substrate with a Ti (IV) precursor in a non-polar solvent and with hydrochloric acid in water under hydrothermal conditions, thereby forming a titanium dioxide nanoarray
- contacting the titanium dioxide nanoarray with a solution comprising a platinum group metal precursor;
- drying the titanium dioxide nanoarray;
- and
- calcining the titanium dioxide nanoarray;
- wherein the titanium dioxide nanoarray is mesoporous.
3 more elements
An article comprising:
- a substrate;
- a mesoporous, rutile titanium dioxide nanoarray integrated onto the substrate;
- a platinum group metal disposed on the titanium dioxide nanoarray.
A method of oxidizing a combustion exhaust, the method comprising:
- contacting a source of combustion exhaust with a mesoporous, rutile titanium dioxide nanoarray having a platinum group metal dispersed thereon.
Dependencies are inferred from the claim text.