▎ 摘　　要

Tungsten carbides (W2C and WC) materials, as promising non-precious electrocatalysts, possess highly efficient activity for HER. Herein, N-doped graphene supported tungsten carbide (N-W2C/WC) nanocomposite is synthesized by spray drying process followed with a two-step pyrolysis treatment, which exhibits a remarkable hydrogen evolution reaction (HER) activity and excellent stability in acidic solution and alkaline solution. N-W2C/WC displays low overpotentials of 166 mV and 125 mV to achieve a current density of 10 mA cm(-2) and small Tafel slopes of 60.97 and 62.66 mV dec(-1) in 0.5 M H2SO4 and 1.0 M KOH, respectively. After 1000 cycles, the electrocatalytic activity of N-W2C/WC is almost no change in acidic media but slightly decreases in alkaline media. This work might pro-vide a new way to explore high comprehensive performance tungsten-based electro-catalyst for HER. (C) 2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.