Articles & Issues
- Language
- English
- Conflict of Interest
- In relation to this article, we declare that there is no conflict of interest.
-
This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Copyright © KIChE. All rights reserved.
All issues
DISPERSION OF SUPPORTED PLATINUM CATALYSTS IN OXYGEN II. Further Studies and Mechanism of Redispersion
Korean Journal of Chemical Engineering, September 1985, 2(2),
10.1007/BF02697497
10.1007/BF02697497
Download PDF
Abstract
Further experimental evidences of redispersion on supported platinum catalysts studied by means of TPR, TPD and cyclohexene hydrogenation reaction. Pt/r-Al2O3 exhibits stronger interaction between the metal oxide and the support as compared with Pt/SiO2 and Pt/TiO2. The formation of surface complex is enhanced as oxidation temperature increases. The TPD spectrum of hydrogen on Pt/TiO2 shifts to higher temperature upon reduction at high temperature and shifts again to its original position upon oxidation. Shift of TPD spectrum does not appear in other catalysts. The suggested mechanism for redispersion is the spreading of platinum oxide and trapping of migrating species.
