The deposition of LaFeO 3 at the surface of a graphitic carbon nitride (g-C 3 N 4 ) film via magnetron sputtering followed by oxidation for photoelectrochemical (PEC) water splitting is reported. The LaFeO 3 /g-C 3 N 4 film was investigated by various characterization techniques including SEM, XRD, Raman spectroscopy, XPS and photo-electrochemical measurements.Our results show that the hydrogen production rate of a g-C 3 N 4 film covered by a LaFeO 3 film, exhibiting both a thickness of ca. 50 nm, is of 10.8 μmol.h -1 .cm -2 under visible light irradiation. This value is ca. 70% higher than that measured for pure LaFeO 3 and g-C 3 N 4 films and confirms the effective separation of electron-hole pairs at the interface of LaFeO 3 /g-C 3 N 4 films. Moreover, the LaFeO 3 /g-C 3 N 4 films were demonstrated to be stable and retained a high activity (ca. 70%) after the third reuse.

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