2025

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Structural and electrochemical characterization of MoS2/316-L stainless steel electrodes for efficient water splitting
(UMT, Lahore, 2025) MARYAM AHSAN
The thesis investigates the structure-activity relationship between 316L stainless steel and MoS2 thin films developed using chemical vapor deposition in response to the requirement of earth-abundant electrocatalysts to pursue water separation. In order to sulfurize the films, the X rays diffraction characteristic was employed and the films, heated at a temperature ranging between 650 to 750oC were subjected to cyclic voltammetry at the potentials referenced to RHE. The XRD shows traces of MoO3, however, increased temperature gives more clear evidence of MoS2 and a smaller crystal shape. The study shows that the increase in sulfurization temperatures coincide with a better performance of electrodes regarding HER. Improvements are credited to total conversion of phases, and densities of edge sites which are catalytically reachable, and also, better couplings with substrates electronically. Altogether, the findings reveal 750oC sulfurization as the most efficient one in the experimented window, forming 316L stainless steel as low-costs environment to MoS2 electrocatalysts. These results confirm the scalability of MoS2/steel electrodes and the attainability of green-hydrogen systems and encourage subsequent studies of morphology connection-performance relationships, stability, and complete kinetics.