Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10244429 | Journal of Catalysis | 2005 | 5 Pages |
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.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Catalysis
Authors
Xiaoyan Zhong, Jing Zhu, Jingyue Liu,