Hydrogenation of alkenes over supported gold
- 1 January 1979
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases
- Vol. 75, 385-394
- https://doi.org/10.1039/f19797500385
Abstract
Gold has been supported upon SiO2 and γ-Al2O3 using an impregnation technique and HAuCl4 solutions. The severity of the conditions required to effect the reduction/decomposition of the acid to metallic Au upon the support decreased and the activity per unit weight of metal in the hydrogenation of pent-1-ene at 373 K increased, as the concentration of Au decreased from 5.0 to 0.01%. Au supported upon SiO2 at these concentrations could be atomically dispersed, but in lower dispersions when upon γ-Al2O3. An increase in Au dispersion as its concentration decreased, which would provide an explanation for the unusual activity of these catalysts, may have been detected only by electron spin resonance and not by more traditional methods of characterisation. Preliminary results for SiO2-supported Ag and Pt are compared with Au.Keywords
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