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A series of 0.5–4.3 wt% Rh/Al 2 O 3 catalysts were prepared by flame synthesis. STEM indicated relatively narrow particle size distributions for all catalysts and the mean particle size increased almost linearly with the Rh content in the range 0.96–1.65 nm. A DRIFTS study of CO adsorption on as prepared Rh/Al 2 O 3 and after heat treatment in hydrogen at 400 °C revealed...
The intrinsic selectivity of cinchonidine-modified Pt/alumina is poor in the hydrogenation of 3,5-di-(trifluoromethyl)-acetophenone but stirring of the catalyst system in toluene under nitrogen prior to reaction more than triples the ee. SEM and TEM analysis revealed dramatic restructuring of the catalyst and the Pt particles. We propose that the interaction of the hydroxy methyl-quinoline fragment...
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