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http://nopr.niscpr.res.in/handle/123456789/29644| Title: | Surface analysis of supported platinum catalysts-encapsulation model for metal-support interaction: An XPS study |
| Authors: | Malathi, R Rao, P Madhusudhan Viswanathan, B Viswanath, R P |
| Issue Date: | Oct-1998 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | The surface properties of supported platinum catalysts have been investigated using hydrogen chemisorptions and XPS. A mixed oxide system, Pt/TiO2Al2O3 has been compared with titania-supported systems. A metal support interaction after high temperature reduction (HTR) has been observed in these systems. The chemisorptions measurements indicate a weak suppression in hydrogen uptake after HTR for the mixed oxide system. The encapsulation of the metal particles by the reduced support after reduction at 773 K has been elucidated based on the difference in the binding energies between oxygen atom and the support metal. This has been found to be more marked for TiO2 prepared from gel and for mixed oxide samples than for the commercial TiO2 The role of the SMSI state in catalytic activity towards reduction of cinnamaldehyde has also been investigated. |
| Page(s): | 285-290 |
| ISSN: | 0975-1017 (Online); 0971-4588 (Print) |
| Appears in Collections: | IJEMS Vol.05(5) [October 1998] |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| IJEMS 5(5) 285-290.pdf | 1.43 MB | Adobe PDF | View/Open |
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