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      High electrochemical selectivity of edge versus terrace sites in two-dimensional layered MoS2 materials.

      Nano Letters
      American Chemical Society (ACS)
      Electrochemical selectivity, Two-dimensional materials, MoS2, Hydrogen evolution reaction, Li−S batteries

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          Abstract

          Exploring the chemical reactivity of different atomic sites on crystal surface and controlling their exposures are important for catalysis and renewable energy storage. Here, we use two-dimensional layered molybdenum disulfide (MoS2) to demonstrate the electrochemical selectivity of edge versus terrace sites for Li-S batteries and hydrogen evolution reaction (HER). Lithium sulfide (Li2S) nanoparticles decorates along the edges of the MoS2 nanosheet versus terrace, confirming the strong binding energies between Li2S and the edge sites and guiding the improved electrode design for Li-S batteries. We also provided clear comparison of HER activity between edge and terrace sites of MoS2 beyond the previous theoretical prediction and experimental proof.

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          Author and article information

          Journal
          25372985
          10.1021/nl503730c

          Electrochemical selectivity,Two-dimensional materials,MoS2,Hydrogen evolution reaction,Li−S batteries

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