Tunable structure-activity correlations of molybdenum dichalcogenides (MoX2; X=S
This article provides a detailed analysis of the tunable structure-activity correlations of electrocatalysts based on molybdenum dichalcogenides (MoX2; X=S, Se, Te) synthesized via hydrothermal methods, with a particular focus on optimizing the electrocatalytic performance for hydrogen generation. The study sheds light on the factors that influence the electrocatalytic activity of these materials, including their crystal structure, morphology, and surface chemistry. The authors describe the various synthesis methods used to prepare the electrocatalysts, including the use of different precursors, solvents, and reaction conditions. They also discuss the characterization techniques employed to analyze the samples, such as X-ray diffraction, scanning electron microscopy, and energy dispersive X-ray spectroscopy. Overall, the article offers valuable insights into the design and optimization of MoX2-based electrocatalysts for hydrogen generation, which could have important implications for the development of sustainable energy technologies.
ABSTRACT
INTRODUCTION
CONCLUSION
REFERENCES
Hydrogen Evolution Reaction (HER) has always gained wide attention as one of the eco-friendly and sustainable pathways for efficient hydrogen generation and storage; also, two-dimensional molybdenum dichalcogenide (MoX2, where X stands for S, Se, Te) layers have emerged as a class of quasi-ideal electrocatalysts because of their large surface area, rich reserves and outstanding conductivity. However, besides greater HER activity, the maturity and diversity of modification strategies result in a more puzzling relationship between electrocatalytic mechanisms and the corresponding practical performance. In this article, based on a comprehensive review of fundamentals, principles and interconnected similarities of the MoX2 family, we focus on the structure-activity correlation of layered MoX2 for HER enhancement via hydrothermal synthesis. This method is summarized from different experimental systems to efficiently modulate the crystal structure and surface for boosted HER activity. Here, with the adjustment of three key experimental parameters: the categories of MoX2, reaction temperature and the molar amount of added reactants, the optimum HER performance can be obtained at the best conditions (MoSe2 species, 180℃ and a vast ratio of the reductant or metal precursor), and more microscopically, a controlled structure-activity relationship can be inducted. This summary may pave a new path for the controllable synthesis and modification of MoX2-based catalyst materials.