In this paper, we report a highly active and robust three-dimensional (3D) Cu foam@MoSx electrode for electrocatalytic hydrogen evolution reaction (HER) prepared by a simple and controllable electrochemical deposition method. Highly conductive Cu foam scaffold with exposed 3D frameworks can not only ensure an intimate interface for facilitate a fast electron transfer but also render the deposited amorphous MoSx with abundant exposed active sites and large contact area for electrolyte diffusion. As a result, the optimized Cu foam@MoSx electrode exhibits high activity for electrocatalytic H-2 evolution in 0.5 M H2SO4, the required overpotentials to reach current densities of 10 and 100 mA cm(-2) are 200 and 250 mV, respectively. Moreover, the Cu foam@MoSx electrode shows no obvious deactivation after 2000 potential cycling and also retains its outstanding electrocatalytic activity after 10 h bulk electrolysis for H-2 evolution due to the robust adhesion of MoSx. This work provides a new strategy to the development of highly active HER electrocatalyst by integrating high-surface-area and conductive substrate and the favorable surface structures of active components. (C) 2018 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.