Abstract
This work presents the effect of anodic pretreatment of 2D-MoS2 nanoplatelet-shaped films hydrothermally synthesized on the anodized Ti substrate for electrocatalytic H2 evolution from water. Structural and compositional changes in MoS2 species assembly were studied by X-ray photoelectron spectroscopy, X-ray diffraction, scanning electron microscopy, and energy dispersive X-ray spectroscopy. The electrochemical performance of designed catalysts was studied in 0.5 mol L−1 H2SO4 solution by cyclic voltammetry and chronopotentiometry for 12 h. The growing hydrogen evolution reaction efficiency upon anodic pretreatment was ascribed to increased sulfur content in the MoS2 nanoplatelet edges in the form of more active bridging S22− and apical S2− groups.
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