In recent decade use of renewable energy sources as viable alternatives to fossil-fuels has been rising. The hydrogen, if available, can be used as fuel to generate clean energy is considered one of the least pollutants. An industrial method of producing hydrogen is electrolysis of alkaline aqueous solutions that require the use of a noble metal as electrocatalytic. The electrocatalytic is useful for hydrogen evolution reaction (HER) that has low overpotential for HER and high corrosion resistance in electrolysis environment. According to the literature data, the nickel–molybdenum alloys cloud be suitable electrocatalytic for hydrogen production through water electrolysis. In this study, Ni-Mo coatings were prepared on 304L stainless steel substrate by electrodeposition method from citrate bath containing different concentrations of ionic liquid 1-methyl-imidazolium-chloride (0, 10,100 ppm) for using as an electrocatalytic in hydrogen evolution reaction. The role of ionic liquid on the mechanisms of deposition was studied by cyclic voltammetry and electrochemical impedance spectroscopy. The results showed that ionic liquid caused a rise in solution conductivity and reduced the electrodeposition potential. In the process of electrodeposition of nickel-molybdenum, ionic liquid decreased the amount of charge transfer resistance, but the double layer capacity increased. X-ray diffraction analysis indicated that all coatings were composed of a solid solution with the preferred orientation of (111) and deposits have quasi- amorphous/nanocrystaline structure which the crystallite size decreases when the ionic liquid concentration is increased. EDS analysis showed that the molybdenum content of the deposits increases by increasing the ionic liquid concentration. The roughness of the coatings was reduced by the addition of ionic liquid. The SEM images showed that all coatings have a crack-free, nodular, compact and non-porous nature that the size of the nodules is decreased by increasing the ionic liquid concentration. Results of tafel polarization and electrochemical impedance spectroscopy in a solution of 1 M KOH showed that the addition of ionic liquid did not affect on the electrocatalytic properties of coatings but greater corrosion resistance observed when ionic liquid was used in the electrodeposition process. Considering the concentration 100 ppm as the optimum concentration of ionic liquid, cathodic polarization was performed in these conditions, the suitable current densities of 30, 60 and 100 for deposition were selected from cathodic polarization. Current efficiency decreased with increasing the electroplating current density. The coatings were formed of a solid solution with the preferred orientation of (111) that the crystallite size, crystallinity are decrease and molybdenum content of coatings are increased by reduction of current density. In this case, increasing the electroplating current density results in decreasing the compaction of coatings, which they have nodular and crack-free morphology. Results of tafel polarization showed that the corrosion resistance of coatings decreased with increasing electroplating current density. The coating deposited in current density of 60 mA/cm 2 has better electrocatalytic properties. Results of electrochemical impedance in about -1.25 v respect to calomel reference, in comparison to other coatings the deposited coating in 60 ma/cm2 showed more real area and it shows better electrocatalytic activity of this coating. Keywords: Ni-Mo coatings, ionic liquid, hydrogen evolution reaction, electrodeposition, electrocatalytic activity, real area.