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Process for making a noble metal on tin oxide catalyst
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Copyright Year | 1989 |
| Description | A quantity of reagent grade tin metal or compound, chloride-free, and high-surface-area silica spheres are placed in deionized water, followed by deaerating the mixture by boiling and adding an oxidizing agent, such as nitric acid. The nitric acid oxidizes the tin to metastannic acid which coats the spheres because the acid is absorbed on the substrate. The metastannic acid becomes tin oxide upon drying and calcining. The tin-oxide coated silica spheres are then placed in water and boiled. A chloride-free precious metal compound in aqueous solution is then added to the mixture containing the spheres, and the precious metal compound is reduced to a precious metal by use of a suitable reducing agent such as formic acid. Very beneficial results were obtained using the precious metal compound tetraammine platinum(II) hydroxide. |
| File Size | 331639 |
| Page Count | 3 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19900010864 |
| Archival Resource Key | ark:/13960/t6353jn3t |
| Language | English |
| Publisher Date | 1989-08-08 |
| Access Restriction | Open |
| Subject Keyword | Inorganic And Physical Chemistry Water Tin Compounds Hydroxides Catalysts Synthesis Chemistry Spheres Coatings Boiling Substrates Nitric Acid Silicon Dioxide Tin Oxides Aqueous Solutions Formic Acid Noble Metals Drying Deionization Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Patent |
