The as-prepared Sb2S3 thin films were coated with platinum (Pt) in order to evaluate their PEC performance for water splitting. The current density-voltage curves were obtained under 1 sun illumination in pH 0 (1 M H2SO4) in a 3-electrode configuration with a Pt wire as the counter electrode and Ag/AgCl as the reference electrode. Figure shows the PEC performance of such a photocathode with a maximum photocurrent density of ~ 0.7 mA cm -2 . Sb2S3 was found not to be stable in 1 M H2SO4 (pH 0) as evidenced from the inset of Figure (a) where the photocurrent density rapidly decreased within 30 s. This lack of stability indicates that the Sb2S3 thin film requires coating with corrosion protection layers such as TiO2, which has also been used as an electron collector in Sb2S3 sensitized solar cells. Therefore, TiO2 could act as both an electron collector and protection layer for the Sb2S3 photocathode. Atomic layer deposition (ALD) TiO2 (100 nm) was deposited on the Sb2S3 thin films, followed by photo-electrodeposition of Pt to fabricate an ALD TiO2-protected Sb2S3 photocathode.