Particle size effect in liquid-phase hydrogenation of phenylacetylene over Pd catalysts: Experimental data and theoretical analysis

摘要

The liquid-phase hydrogenation of phenylacetylene (PA) over 1 wt% Pd/Al2O3 catalysts with the mean palladium cluster size varying from 1.5 to 22 nm was studied at 5 bar H2 pressure and 25 degrees C. Turnover frequency in hydrogenation of the triple and double bonds displayed a significant increase with an increase of the cluster size, which was more pronounced for the former case.