Defect- and S-rich ultrathin MoS2 nanosheet embedded N-doped carbon nanofibers for efficient hydrogen evolution

As advanced catalysts for hydrogen evolution reaction (HER), MoS2-based electrocatalysts have attracted tremendous attention due to their enhanced HER activity. Herein, a facile method is reported to prepare a new type of defect-and S-rich ultrathin MoS2 nanosheet embedded N-doped carbon nanofiber composite (MoS2/NCNFs), which demonstrates a small HER overpotential of 135 mV at 10 mA cm(-2) and a large cathodic current density of 65.6 mA cm(-2) at only 200 mV. Furthermore, a small Tafel slope of 48 mV dec(-1), a large exchange current density of 24.2 mA cm(-2), as well as superior cycling stability are obtained. This success of embedding defect-and S-rich ultrathin MoS2 nanosheets in N-doped carbon nanofibers paves a new avenue for highly efficient catalysts for HER in the near future.