Synthesis of Pd-Ag on charcoal catalyst for aerobic benzyl alcohol oxidation using [Hmim][PF₆]

Pd on charcoal particles were prepared by wet impregnation to develop commercial catalyst for aerobic benzyl alcohol oxidation. Especially, one of room temperature ionic liquids, [Hmim][PF₆], was used as an effective solvent in the synthesis to improve the metal dispersion of the catalysts. Among the Pd/Charcoal with various Pd concentrations, 7.5 wt% catalyst showed the higher catalytic activity and stability. Moreover, Ag was used as a promoter with various ratios in catalyst preparation. Under identical reaction conditions, the catalyst with 9: 1 of Pd and Ag weight ratios was most active due to higher metal dispersion.