Well-defined 2D nanoheterostructure based on MoS2 in-situ grown on CdS nanosheet at room temperature for efficient visible-light-driven H2 generation

To conquer the drawback of charge recombination that significantly impedes the application of photocatalytic H-2 generation from water. In this manuscript, the strategies of morphology, band gap, and active site engineering were adopted to develop a novel 2D MoS2/CdS nanoheterostructure at room temperature. SEM and TEM characterizations reveal the intimate contact interface formation between MoS2 and CdS. Besides, various techniques indicate the efficient charge separation owing to the well-defined heterostructure construction. As a result, the MoS2/CdS exhibits high performance with an optimized H2 evolution rate of 28.2 mmol g-1 h-1 which far exceeds that of pristine CdS by more than 9 folds. The demonstrated strategy of this paper has a promising to inspire the construction of good quality heterostructure catalysts and even high performance, lowcost, and energy-effective catalysts may be obtained. (c) 2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

Automated summary

In this study, a novel 2D MoS2/CdS nanoheterostructure was developed by employing strategies of morphology, band gap, and active site engineering to overcome the drawback of charge recombination in photocatalytic H-2 generation. The results showed that the intimate contact interface formation between MoS2 and CdS, as well as the efficient charge separation, contribute to the high performance of MoS2/CdS with an optimized H2 evolution rate of 28.2 mmol g-1 h-1, which is over 9 times higher than that of pristine CdS. This research has important implications for the construction of high-quality heterostructure catalysts.