Enhanced photoelectrochemical hydrogen production efficiency of MoS2-Si heterojunction

w Photoelectrochemical water splitting is one of the viable approaches to produce clean hydrogen energy from water. Herein, we report MoS2/Si-heterojunction (HJ) photocathode for PEC H-2 production. The MoS2/Si-HJ photocathode exhibits exceptional PEC H-2 production performance with a maximum photocurrent density of 36.33 mA/cm(2), open circuit potential of 0.5 V vs. RHE and achieves improved long-term stability up to 10 h of reaction time. The photocurrent density achieved by MoS2/Si-HJ photocathode is significantly higher than most of the MoS2 coupled Si-based photocathodes reported elsewhere, indicating excellent PEC H-2 production performance. (c) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement