Production of hydrogen peroxide has been achieved by the catalytic oxidation of primary and secondary alcohols with oxygen, in presence of a palladium catalyst. The catalyst was a complex of palladium with a bidentate nitrogen ligand and an acid cocatalyst. 2,9-Dimethyl-4,7-diphenyl-1,10-phenantroline (1) was selected as the most efficient ligand, and perfluorooctanoic acid gave the best results as cocatalyst. In this work the effects of nitrogen Ligands, acid cocatalyst, alcohols, as far as temperature and oxygen pressure are concerned, are investigated.