Molybdenum was used as cathode for the hydrogen production from acid solutions. The effect of acid concentration, cathodic potential and temperature on the rate of hydrogen evolution was investigated and discussed. The results were compared with those of platinum. Open circuit potential measurements, polarization technique and EIS were used. Impedance measurements under open circuit conditions and under cathodic polarization were carried out and the data were fitted to theoretical data according to a proposed electronic circuit model. The results reveal that molybdenum is a good candidate for hydrogen production for long time. The rate of hydrogen evolution is constant and no electrode deterioration was noticed. The process is economic and convenient and does not need any special treatments. (C) 2014 Elsevier B.V. All rights reserved.