Abstract
We investigated the interface structure between the Pt nanoparticles and the alumina support in a Pt/Al2O3 model catalyst reduced in flowing hydrogen gas at different temperatures by cross-sectional atomic-resolution transmission electron microscopy nanodiffraction techniques. An interfacial Pt8Al21 alloy with a tetragonal structure was formed at the Pt-alumina interface during the high-temperature reduction at 1073 K. This alloy phase was not formed when the Pt/Al2O3 model catalyst was reduced at 773 K. The platinum-assisted reduction of the alumina support and the subsequent strong metal-support interaction at the interface may be responsible for the formation of the interfacial alloy phase.
Original language | English (US) |
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Pages (from-to) | 9-13 |
Number of pages | 5 |
Journal | Journal of Catalysis |
Volume | 236 |
Issue number | 1 |
DOIs | |
State | Published - Nov 15 2005 |
Externally published | Yes |
Keywords
- Alumina
- Catalyst
- Electron microscopy
- Interfacial phase
- Metal-support interaction
- Platinum
ASJC Scopus subject areas
- Catalysis
- Physical and Theoretical Chemistry