Fabrication of micro/nano wettability MoS2 hydrogen evolution electrocatalyst based on femtosecond laser

The process of hydrogen production through water electrolysis involves ionic interactions and the dynamic process of hydrogen bubble formation on the electrode surface. In this study, we employed a combination of femtosecond laser and hydrothermal synthesis to fabricate a novel MoS2 electrode. The double-scale structure of this substrate increases its specific surface area, facilitating the presence of active sites for the hydrogen evolution reaction. The growth of nano-scale catalyst further enhances wettability, promoting rapid detachment of gas bubbles and replenishment of water. This method not only facilitates ionic interactions but also accelerates the formation of macroscopic bubbles. Under alkaline conditions, electrode achieved an impressive current density of 10 mA cm-2 with a low overpotential of only 99 mV. This novel MoS2 hydrogen evolution catalyst holds practical value, paving the way for the design of more efficient and stable electrocatalysts.(c) 2023 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.