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There has been an intense research effort to develop 2-H MoS2 based catalysts to reduce or eliminate the use of Pt/C at higher metal loading for the hydrogen evolution reaction (HER) in catalytic hydrolysis of water, which enables the capture of renewable energy sources as fuel and chemical. However, the study of its uncommon polymorph, 1T-MoS2, and particularly the doping effect with transition metal (TM) is rather limited due to the instability of this phase. Here, we report a simple ambient temperature modification method using sonication to dope the single layer 1T-SMoS2 with various TM precursors. It is found that 1T-SMoS2 is more active than corresponding 2H-SMoS2 and the inclusion of 3 wt % Pt or Pd can also further enhance the HER activity. STEM-EELS and XAS show that the active single TM atom doping on this surface accounts for the high activity. Kinetic and DFT analyses also illustrate that the metallic nature of 1T-SMoS2 greatly facilitates the proton reduction step from water, rendering it non...

Engineering Monolayer 1T-MoS2 into a Bifunctional Electrocatalyst via Sonochemical Doping of Isolated Transition Metal Atoms

Engineering Monolayer 1T-MoS₂ into a Bifunctional Electrocatalyst via Sonochemical Doping of Isolated Transition Metal Atoms