Pt nano-particles are loaded onto the surface of an active carbon material through in-situ electrochemical reduction. With 0.66 % mole percentage of Pt, the kinetics of electrochemical hydrogen insertion into porous carbon material is significant improved. The enhancement resulted from the H underpotential deposition on Pt surface and subsequent H spillover from Pt surface to carbon interlayers. (C) 2015 Elsevier Ltd. All rights reserved.