Hydrogen is undoubtedly considered as the cleanest energy source and hence the urgency for production of H-2 is a concern to the scientific community. The major bottleneck for electrocatalytic hydrogen production is still exists as the reported catalysts, mainly noble metal based, are extremely costly. Thus the fabrication of cheap and noble metal free electrocatalyst for Hydrogen Evolution Reaction (HER) is still seeking. Here, a simplistic method is developed for the synthesis of carbon assimilated molybdenum carbide (beta-Mo2C) hollow sphere which showed effective electrocatalysis for HER. The synthesis of desired beta-Mo2C-C hollow sphere is based on high temperature carbothermal reduction (800 degrees C in 10%-H-2/N-2 atmosphere) of carbon incorporated MoO2 spheres. The synthesized beta-Mo2C-with an optimal carbon loading reaches 10 mA/cm(-2) current density at a low overpotential of 146 mV with a small tafel slope of 90 mV dec(-1) for the electrochemical hydrogen evolution (HER) in 0.5 M H2SO4. The improved catalytic performance, long-term stability make beta-Mo2C-C hollow sphere an auspicious HER electrocatalyst. (C) 2018 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.