Core-shell particles with catalytic activity
US9539563B2 · kind B2 · utility
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9Claims
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Key dates
| Filing date | May 30, 2012 |
| Grant date | Jan 10, 2017 |
| Priority date | — |
| Expiry date | Mar 13, 2033 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2235/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention pertains to novel core-shell particles comprising a core of iron oxide and a shell of cobalt oxide, characterized in that they are spherical with a number average diameter, as measured by TEM, of between 1 and 20 nm. This invention is also directed to their uses in the manufacture of a catalyst, and to the method for preparing these particles, by precipitating cobalt oxide onto magnetite or hematite particles which are themselves precipitated from Fe(III) and optionally Fe(II) salts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.