Visible-light-responsive S-vacancy ZnIn2S4/N-doped TiO2 nanoarray heterojunctions for high-performance photoelectrochemical water splitting

S v -ZIS/N–TiO 2 nanoarrays produced a photocurrent density of 4.9 mA cm −2 at an external potential of 1.23 V vs. RHE, and achieved PEC H 2 evolution rate of 49.59 mmol g −1 h −1 . The IPCE of the photoanode device is ∼57.9% at 350 nm and ∼7.3% at 400 nm.