Hydrogenation of CFC-114a ($CCl_2FCF_3$) was carried out over supported palladium and bimetallic catalysts. Four different supports were used; active carbon, alumina, silica and titania, and metal loading was 1 wt %. Alumina and titania supported palladium catalysts showed higher activity and selectivity for HFC-134a ($CH_2FCF_3$) than those on active carbon and silica supports. The reactivity patterns are in good correlation with the amount of strongly adsorbed CFC reactant, as evidenced by the TPD experiments. Bimetallic catalysts (palladium with 1b metal;Au and Ag) supported on alumina showed some increase in activity and selectivity. It is presumed from hydrogen chemisorption and TPD that the role of 1B metals is to increase the dispersion of palladium crystallites. The EXAFS results concerning the nature of palladium clusters are provided. The optimum reaction conditions for the present catalysts were; mole ratio of $H_2$/CFC = 3 and temperature = 250 - 300℃.
