IR study of CO adsorption on Pt, Re and Pt–Re/Al2O3 catalysts before and after coking
✍ Scribed by James A Anderson; Fai Kait Chong; Colin H Rochester
- Publisher
- Elsevier Science
- Year
- 1999
- Tongue
- English
- Weight
- 318 KB
- Volume
- 140
- Category
- Article
- ISSN
- 1381-1169
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## Abstract **BACKGROUND:** The metal dispersed over a support can be present as small crystallites with sizes less than 5 nm. The smaller crystallites favour aromatization while larger crystallites favour cracking/hydrogenolysis. Sintering results in the agglomerization of smaller metal crystallit
Bimetallic Pt-Re/A1203 catalysts are prepared under hydrogen atmosphere by a surface redox reaction between hydrogen adsorbed on a parent platinum/alumina catalyst and the perrhenate ion ReO 4. This reaction, called catalytic reduction, occurs only in an acidic medium, a maximum rhenium deposition a