Activity and selectivity of carbon supported palladium catalysts prepared from bis(η3-allyl)palladium complexes in phenylacetylene hydrogenation

• Published in: Catalysis communications 2018-11, Vol.116, p.67-71
• Main Authors: Al-Wadhaf, H.A., Karpov, V.M., Katsman, E.A.
• Format: Article
• Language: English
• Subjects: Activity; Bis(η3-allyl)palladium complexes; Dispersity; Pd/C catalyst; Phenylacetylene hydrogenation; Selectivity
• ISSN: 1566-7367; 1873-3905
• DOI: 10.1016/j.catcom.2018.08.010

Liquid phase hydrogenation of phenylacetylene was investigated on a series of 9.1 wt% Pd/C catalysts prepared from bis(η3-allyl)palladium complexes, as well as commercial Russian Pd/C catalyst (GIPKH-108). Pd/C catalysts were characterized by oxygen absorption and SEM. All prepared Pd/C catalysts demonstrated very high selectivity to styrene. The reduction temperature of palladium precursor has a significant effect on the palladium dispersity, but the substituent near terminal carbon atom of allyl ligand affects the dispersity more essentially than reduction temperature. Pd/C catalyst prepared from bis[(η3-allyl)palladium acetate] showed highest metal dispersity, activity and selectivity in the hydrogenation of phenylacetylene to styrene. [Display omitted] •Pd/C catalysts synthesized from bis(η3-allyl)palladium complexes.•Pd precursor affects activity and selectivity in phenylacetylene hydrogenation.•Activity and selectivity depends on the Pd particle specific surface area.•Pd/C catalyst prepared from allylpalladium acetate has highest catalytic performance.