Molybdenum disulfide is an inorganic material consisting of stacked layers of molybdenum and sulfur atoms. It is a potential material for applications such as solar cells and hydrogen production, but understanding the fundamental mechanisms of how light activates molybdenum disulfide is essential for further development.
To study these mechanisms, the research team used a combination of time-resolved photoemission spectroscopy and density functional theory calculations. Time-resolved photoemission spectroscopy allowed them to track the movement of electrons in the material as it was exposed to light.
Their investigations revealed that the activation process involves a complex interplay between different electronic states and atomic rearrangements, and light can induce a transient, catalytically active phase of molybdenum disulfide.
Lead author Dr. Johannes Biskupek, HZB and FUB, explains: "Our study shows the importance of the interplay of different electronic states and atomic rearrangements in light-induced catalysis. We believe that our work provides important insights into the development of new and more efficient catalysts for various applications, including hydrogen production."
The work highlights the potential of time-resolved photoemission spectroscopy combined with density functional theory calculations to study the atomic-scale mechanisms of light-activated catalysts.
