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Solvent-free oxidation of benzyl alcohol using titania-supported gold–palladium catalysts: Effect of Au–Pd ratio on catalytic performance

Domenii publicaţii > Chimie + Tipuri publicaţii > Articol în revistã ştiinţificã

Autori: Dan I. Enache, Dean Barker, Jennifer K. Edwards, Stuart H. Taylor, David W. Knight, Albert F. Carley and Graham J. Hutchings

Editorial: Catalysis Today, 122 (3-4), p.407-411, 2007.

Rezumat:

The oxidation of benzyl alcohol with molecular oxygen under solvent-free conditions has been investigated using a range of titania-supported Au–Pd alloy catalysts to examine the effect of the Au–Pd ratio on the conversion and selectivity. The catalysts have been compared at high reaction temperature (160 °C) as well as at 100 °C, to determine the effect on selectivity since at lower reaction temperature the range of by-products that are formed are limited. Under these conditions the 2.5 wt.% Au–2.5 wt.% Pd/TiO2 was found to be the most active catalyst, whereas the Au/TiO2 catalyst demonstrated the highest selectivity to benzaldehyde. Toluene, formed via either a hydrogen transfer process or an oxygen transfer process, was observed as a major by-product under these forcing conditions.

Cuvinte cheie: Benzyl alcohol oxidation; Gold; Palladium; Titania

URL: http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TFG-4MTK969-2&_user=10&_coverDate=04%2F30%2F2007&_rdoc=1&_fmt=&_orig=search&_sort=d&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=ebeb549e47712cca4859ea3f01853d11