| Autor: |
Bruce A. Lerner, Wolfgang M.H. Sachtler, B. T. Carvill |
| Rok vydání: |
1992 |
| Předmět: |
|
| Zdroj: |
Journal of Molecular Catalysis. 77:99-108 |
| ISSN: |
0304-5102 |
| DOI: |
10.1016/0304-5102(92)80188-m |
| Popis: |
Preparations of Pt/mordenite and Pt/Y catalysts varying in metal load and proton concentration have been studied. Temperature-programmed reduction (TPR) and temperature-programmed desorption (TPD) have been used to characterize the metal species. High-temperature peaks observed in the TPD indicate extremely small, potentially monatomic Pt species. For mordenite, monatomic Pt may reside in the side pockets of main channels. MCP has been used as a probe reactant to determine differences in ring-opening selectivity. The ratio of the ring-opening products 2-MP/3-MP is greater than the statistical and thermodynamic equilibrium value of 2 for low-load Pt/HMor. Mordenite appears to be unique among zeolites, as it permits stabilization of isolated Pt atoms without completely shielding them from potential adsorptives such as MCP. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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