The promoting role of minor amount of water in solvent-free hydrogenation of halogenated nitrobenzenes

摘要

This study shows that minor amount of water plays a very important role in solvent-free hydrogenation of halogenated nitrobenzenes.For dried sponge Pd,the reaction cannot occur in the absence of water.For Pd/C catalyst,minor amount of water reduces the induction time,increases the reaction rate and reaction TOFs.Water might enhance the diffusion,adsorption and dissociation of H_2 on Pd catalysts.