Journal
NANO LETTERS
Volume 14, Issue 12, Pages 7138-7144Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl503730c
Keywords
Electrochemical selectivity; Two-dimensional materials; MoS2; Li-S batteries; Hydrogen evolution reaction
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Funding
- Department of Energy, Office of Basic Energy Sciences, Materials Sciences and Engineering Division [DE-AC02-76-SFO0515]
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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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