Template Synthesis of Hollow MoS₂ Microspheres with Enhanced Electrocatalytic Activity for Hydrogen Evolution

摘要

Novel hollow MoS2 microspheres with enhanced electatalytic activity for hydrogen evolution reaction(HER) have been synthesized by a facile self-sacrificial template method using MnCO3 spheres asprecursor. During a hydrothermal sulfuration process, uniform MnCO3 spheres transformed toMoS2/MnS core-shell structures. After removal of MnS with acid treatment of MoS2/MnS, hollowMoS2 microspheres have been obtained. XRD show that pure MoS2 has been synthesized without anyimpurity. SEM images show that hollow MoS2 structure is spherical morphology and consisted ofmany MoS2 nanosheets, which imply more exposed edges and rims of MoS2 nanosheets. Theelectrocatalytic activity of hollow MoS2 microspheres for HER has been investigated. The results showthat hollow MoS2 microspheres have better activity for HER than conventional MoS2 nanoparticles,which imply that hollow MoS2 structures have more active sites for HER. Template synthesis ofhollow MoS2 microspheres is a suitable choice for high active electrocatalysts.