Abstract
: Molybdenum disulfide (MoS2) has emerged as a highly potential noble metal-free electrocatalyst for the Hydrogen Evolution Reaction (HER). However, edge sites of MoS2 created by sulphur non-stoichiometry play a prominent role in influencing the HER activity. In this work we adopt a simple hydrothermal route under a non-equilibrium condition with in-situ pH modulation, to synthesize its highly exposed edge sites MoS2 which have not been reported so far, and study the variation of its physio-chemical properties that enable an efficient electrocatalytic activity. Electrochemical measurements and impedance studies are conducted to understand harmonic morphology, and structural and composition variation, which were responsible for the activity. Additionally, the Density Functional Theory is adopted to support the enhanced hydrogen absorption and desorption processes in synchronous with various non-stoichiometric structures.
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