Hydrogenation of Cinnamaldehyde over Pd/Al2O3 Catalysts Modified with Thiol Monolayers
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Modification of supported Pt catalysts with thiols has recently been shown to improve the hydrogenation selectivity of α,β-unsaturated aldehydes to unsaturated alcohols. Here, we apply a variety of organic thiol coatings to Pd/Al2O3 catalysts that typically have a much lower intrinsic selectivity for desired product formation. Thiol monolayers were found to increase hydrogenation selectivity to cinnamyl alcohol; however, unlike with Pt catalysts, the increase was independent of the identity of the organic tail.
KeywordsCinnamaldehyde Selective hydrogenation Self-assembled monolayer Palladium platinum Alumina
This research was supported by the Department of Energy, Office of Science, Basic Energy Sciences Program, Chemical Sciences, Geosciences, and Biosciences Division under Grant Number DE-FG02-10ER16206.