Dynamical modulation and electrochemical water splitting effect of oxygen doped onto MoS2 core-shell spheres
Monodispersed MoS2 core-shell spheres were produced by annealing precursor MoS2 core-shell super-spheres at 900 ℃ in Ar.Simultaneously,O-doping amount(atomic fraction)can be tuned from 23.1％of precursor to 17.6％,10.8％,5.5％,and 6.2％of as-prepared materials by regulating the heating rate of 20,10,5,and 2 ℃·min-1,respectively.The lower rate results in a lower amount of O doped onto MoS2 core-shell spheres.Based on the special quasi-molecular superlattices of precursors,an in-situ anion exchange reaction mechanism was proposed to under-stand the dynamical modulation of O-doping.The study on the electrochemical properties of the materials demon-strates that their electrochemical performance in splitting water can be improved by tuning the O-doping amount.
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