Alkaline solution is considered to be more suitable for industrial application of hydrogen production by water electrolysis. However, most of the low-cost electrocatalyts such as Ni3S2 has poor ability to dissociate HO-H, resulting in unsatisfied hydrogen evolution performance in alkaline media. In this paper, a novel vermicular structure of Ni3S2-Ni(OH)(2) hybrid have been successfully prepared on nickel foam substrate (v-Ni3S2-Ni(OH)(2)/NF) through a facile two-step containing hydrothermal and electrodeposition processes. The heterostructure consists of rod-like Ni3S2 and Ni(OH)(2) nanosheets, in which Ni(OH)(2) is coated on the surface of Ni3S2. This structure not only constructs a fast electron transfer channel but also possesses rich heterointerface, thus accelerating the Volmer step and allowing more active sites of Ni3S2 to functioning well. As a result, u-Ni3S2-Ni(OH)(2)/NF exhibited excellent electrocatalytic activity toward HER in 1.0 M KOH solution. It only needs 78 mV and 137 mV to drive current density of 10 mA cm(-2) and 100 mA cm(-2). Moreover, the catalytic stability of this electrocatalyst in alkaline solution is also satisfactory. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.