The semi-hydrogenation of alkynes to alkenes is an important transformation that is followed by both fine chemical and pharmaceutical industries, and thus the catalysts that specialize in such conversions are highly demanded. In this paper, the investigation focuses on the effects of pretreatments such as non-thermal DBD plasma and hydrogen reduction on supported palladium and palladium-ceria for liquid-phase semi-hydrogenation of ethyl phenylpropiolate in methanol at room temperature. The current results from different reduction temperatures show that the activity order is 400°C ~ 500°C &gt; 300°C &gt; 600°C while the selectivity order is 600°C &gt; 500°C ~ 300°C &gt; 400°C. Overall, with 500°C reduction, its yield of cis ethyl cinnamate is the highest of 90.9% at 30-min.<br/>It is interesting that the reduction temperature has a very critical impact on the performance of the catalyst, likely due to the properties of the formed PdCeOx solid solution after reduction. The detailed surface and bulk properties of PdCeOx will be investigated with in-situ FTIR, pulse chemisorption and temperature-programmed techniques.

Supported palladium catalysts for selective hydrogenation of ethyl phenylpropiolate

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.