Characterization of Synthetic Iron Oxides and their Performance as Support for Au Catalysts.
Article first published online: 10 JUN 2010
Copyright © 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Volume 2, Issue 9, pages 1143–1149, September 17, 2010
How to Cite
Centomo, P., Zecca, M., Di Noto, V., Lavina, S., Bombi, G. G., Nodari, L., Salviulo, G., Ingoglia, R., Milone, C., Galvagno, S. and Corain, B. (2010), Characterization of Synthetic Iron Oxides and their Performance as Support for Au Catalysts. ChemCatChem, 2: 1143–1149. doi: 10.1002/cctc.201000049
- Issue published online: 14 SEP 2010
- Article first published online: 10 JUN 2010
- Manuscript Received: 26 FEB 2010
- supported catalysts
Gold(0) catalysts supported on ferric oxide are effective catalysts, and so far, the only heterogeneous ones known for the regioselective hydrogenation of α,β-unsaturated ketones to the corresponding α,β-unsaturated secondary alcohols. A set of ferric oxide samples, synthesized under strictly controlled conditions and thoroughly characterized (X-ray powder diffraction, Mössbauer spectroscopy, micro-Raman spectroscopy, transmission electron microscopy, temperature-programmed reduction), were employed as supports of gold(0) catalysts for this reaction. The activity and selectivity of the catalysts changed in the same direction from one catalyst to another; increasing fractions of nanostructured ferric oxide phases in the support (with nanoparticles size lower than 10 nm) increased both. With a 4 % gold catalyst supported on the ferric oxide sample containing the highest proportion of nanostructured matter, we achieved a selectivity of 66 % towards the unsaturated alcohol at more than 90 % conversion in the hydrogenation of benzalacetone (ethanol, 60 °C, 103 kPa), which is one of the best performances ever reported for this reaction.