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Catalytic defects at molybdenum disulfide ¡°edge¡± planes

Datetime:2016/7/1 16:09:44hit:10500

Catalytic defects at molybdenum disulfide ¡°edge¡± planes. Chemical and physical studies of molybdenum disulfide show that the extreme anisotropy which dominates the bulk properties of this layered compound is also very important in the understanding of surface properties. We observe that the basal surfaces in single crystals are chemically and optically inert. The edge surfaces are highly reactive to both oxygen and metallic impurities. Photoemission spectroscopy and optical absorption show that the edge surfaces have electronic states within the forbidden gap. The density of these surface defects is correlated with the hydrodesulfurization catalytic activity.