Pb3Nb4O13 semiconductor films were prepared on fluorine-doped tin oxide (FTO) substrates by an electrophoretic deposition method. Their phase and morphology were revealed by X-ray diffraction (XRD) and scanning electron microscopy (SEM) respectively. Their photoelectrochemical (PEC) properties were carefully studied on the obtained multiple metal oxide Pb3Nb4O13 electrodes. The energy band structure of Pb3Nb4O13 was analyzed from the Mott-Schottky experimental plot. The results indicate that the energy band structure satisfies the requirements for photoelectrochemical water splitting. The designed material produced a photocurrent density of similar to 46.5 mu A/cm(2) under the illumination of a full arc Xe light. Electrochemical impedance spectroscopy was performed to investigate the kinetics of the electrolyte-electrode interface. The monochromatic incident photon-to-electron current conversion efficiency (IPCE) was measured. Interfacing with the water-oxidation electrocatalyst Co-Pi enhanced the IPCE. (c) 2017 The Electrochemical Society. All rights reserved.