“…4 Photocatalytic fuel cell (PFC) technology, as an extension of photocatalytic technology, has attracted extensive attention of researchers because it can recover the chemical energy in the process of wastewater treatment. 5,6 In a typical PFC system, the semiconductor photoanode generates electron-hole pairs under illumination, the organics are oxidized by holes on the surface of the anode and the electrons are transferred from the external circuit to the cathode to participate in reduction reaction. 7,8 Therefore, an excellent photoanode and cathode material can greatly improve the performance of a PFC system.…”