Synthesis and Characterization of Vertical Molybdenum Sulfide Electrocatalysts with High Intrinsic Activity on Economical SubstratesPublic
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Previous literature has identified vertical molybdenum sulfide (MoS2) as a high performing heterogeneous electrocatalyst for hydrogen evolution reactions (HER) with high stability and precious metal free composition.In this work, high density vertical MoS2 was synthesized through CVD method on economical substrates (molybdenum and carbon foil) to facilitate future scale-up.Characterization by SEM, raman spectroscopy, and XRD confirms the growth of MoS2. Electrochemical measurements reveal that the MoS2 produces an above-average exchange current density of 3.29 * 10-5 A/cm2. The MoS2 has a turnover frequency (TOF) of 35 s-1 at -0.25V demonstrating a high intrinsic catalytic activity by the synthesized nanoflakes on both carbon and molybdenum foil.
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