Cuprous oxide (Cu 2 O) films were grown by electrodeposition in aqueous solutions of varying pH. The effect of bath pH on morphology, structural, and photoelectrochemical (PEC) properties of Cu 2 O films was investigated. XRD showed that all prepared films were polycrystalline Cu 2 O, without formation of competing phases such as CuO and Cu. The film grown in the solution with a pH of 8 is made up of Cu 2 O crystallites with preferential (200) planes exposed. The films deposited at solution pH values of 10, 12 and 14 exhibit Cu 2 O crystallites with preferential (111) planes exposed. As photoelectrodes these Cu 2 O films generate photocurrent upon light illumination. The Cu 2 O film grown in the solution with pH of 12 shows the best PEC performance for hydrogen generation. The (111) facets of the Cu 2 O film were stable without corrosion during the PEC test. A mechanism for the preferred faceting in alkaline solution has been discussed. &