LAUSR

Abstract Molybdenum disulfide (MoS 2 ) is a promising non-precious-metal cocatalyst to replace scarcity and cost Pt, but still suffers from less active sites and poor electrical transport due to the unoptimized geometrical configuration of MoS 2 on the semiconductor surface. Here, two different morphological and structural CdS/MoS 2 heterostructures were successfully prepared by a simple hydrothermal reaction with glucose-assisted or not. With the help of glucose, the MoS 2 nanosheets can nearly vertical stand on the CdS nanowires, which do not have the characteristic stacked layer structure of MoS 2 . This unique configuration leads to a high exposure of the active edge sites and increases charges separation and transfer rate. As expected, the 1D/2D nearly vertical CdS/MoS 2 heterostructures exhibited excellent photocatalytic activity and good durability even after being reused five times. Simultaneously, an apparent quantum yield can be reached to 60.3% at 420 nm, which was the advanced performance among all CdS/MoS 2 composites. This work will provide an intriguing and effective approach on design of low-cost and efficient photocatalysts for enhanced HER performance.