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A comparative study has been performed for Laser induced photo-catalytic oxidation/splitting of water into hydrogen and oxygen over Fe₂O₃, WO₃, TiO₂ and NiO catalysts under the irradiation of a strong laser beam at 355 nm for the first time. The activity of these catalysts and various electron capture agents such as Fe⁺³, Ag⁺, Al⁺³, and Li⁺ in the water splitting process was investigated. The yield of hydrogen and oxygen produced was enhanced considerably by the addition of electron capture agents.