Catalyst production process
Assignee3M Innovative Properties Company
InventorsBadri Veeraraghavan, Thomas E. Wood, Craig S. Chamberlain, Sheryl A. Vanasse
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Abstract
A process for producing gold-based, heterogeneous catalyst systems comprises depositing fine-nanoscale gold onto a nanoparticulate support medium by physical vapor deposition in an oxidizing atmosphere.
Claims34
A process of depositing fine-nanoscale gold onto a nanoparticulate support medium by physical vapor deposition in an oxidizing atmosphere, the process comprising the steps of, in order:
- providing a nanoparticulate support medium that is not a physically vapor deposited support medium;
- placing the nanoparticulate support medium in a physical vapor deposition apparatus;
- exposing the nanoparticulate support medium to an oxidizing atmosphere in the physical vapor deposition apparatus;
- and,
- physically vapor depositing fine-nanoscale catalytically active gold onto the nanoparticulate support medium while the nanoparticulate support medium is the oxidizing atmosphere in the physical vapor deposition apparatus.
A process comprising depositing fine-nanoscale catalytically active gold onto a composite catalyst-support media comprising nanoparticulate metal oxide guest material and activated carbon host material;
- wherein said nanoparticulate metal oxide sues material is not a physically vapor deposited material and wherein said depositing is carried out by sputter deposition in an oxidizing atmosphere comprising at least one oxygen-containing gas selected from oxygen, water, hydrogen peroxide, ozone, and combinations thereof.
A process of depositing fine-nanoscale gold onto a nanoparticulate support medium by physical vapor deposition in an oxidizing atmosphere, the process consisting of the steps of, in order:
- providing a nanoparticulate support medium that is not a physically vapor deposited support medium;
- placing the nanoparticulate support medium in a physical vapor deposition apparatus;
- exposing the nanoparticulate support medium to an oxidizing atmosphere in the physical vapor deposition apparatus;
- and,
- physically vapor depositing fine-nanoscale catalytically active gold onto the nanoparticulate support medium while the nanoparticulate support medium is the oxidizing atmosphere in the physical vapor deposition apparatus.
Dependencies are inferred from the claim text.