Abstract
The atomic structure of a 0.2 atom % Pt doped complex metallic alloy, monoclinic Al13Fe4, was investigated using a single crystal prepared by the Czochralski method. High-angle annular dark-field scanning transmission electron microscopy showed that the Pt atoms were dispersed as single atoms and substituted at Fe sites in Al13Fe4. Single-crystal X-ray structural analysis revealed that the Pt atoms preferentially substitute at Fe(1). Unlike those that have been reported, Pt single atoms in the surface layers showed lower activity and selectivity than those of Al2Pt and bulk Pt for propyne hydrogenation, indicating that the active state of a given single-atom Pt site is strongly dominated by the bonding to surrounding Al atoms.
| Item Type: | Journal article |
|---|---|
| Faculties: | Geosciences > Department of Earth and Environmental Sciences |
| Subjects: | 500 Science > 550 Earth sciences and geology |
| ISSN: | 0002-7863 |
| Language: | English |
| Item ID: | 67916 |
| Date Deposited: | 19. Jul 2019 12:23 |
| Last Modified: | 04. Nov 2020 13:50 |
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