摘要： The development of high-efficiency, low cost, and earth abundant electrocatalysts for overall water splitting remains challengeable. In this work, we present the nickel (Ni) modified MoS2 hybrid catalysts grown on carbon cloth (Ni-Mo-S@CC) through a one-step hydrothermal treatment. The optimized Ni-Mo-S@CC catalyst shows excellent HER activity with low overpotentials of 168 mV at a current density of 10 mA cm?2 in 1.0 M KOH, which is lower than those of Ni-Mo-S@CC (1:1), Ni-Mo-S@CC (3:1) and pure MoS2. Significantly, the Ni-Mo-S@CC hybrid catalyst also displays outstanding OER activity with a low overpotential of 320 mV at a current density of 10 mA cm?2, and the remarkable long-term stability for 30 hours at a constant current density of 10 mA cm-2. Experimental and theoretical analysis based on density functional theory demonstrate that the excellent electrocatalytic performance is mainly attributed to remarkable conductivity, abundant active sites and synergistic effect of Ni-doped MoS2. This work sheds light on a unique strategy to design high performance and stable electrocatalysts for water splitting electrolyzers.