▎ 摘　　要

Integrating transition metal complexes with carbon-based materials, especially graphene, is a useful strategy for synthesizing effective hydrogen evolution catalysts. Herein, we report a design of hollow hexagonal NiSe-Ni3Se2 nanosheets grown on reduced graphene oxide (NiSe-Ni3Se2/rGO) by a simple hydrothermal method as an effective catalyst for hydrogen evolution reaction (HER) in the full pH range. In 0.5 M H2SO4, the NiSe-Ni3Se2/rGO possesses 112 mV to achieve 10 mA cm(-2) and a small Tafel slope (61 mV dec(-1)). In 1.0 M PBS and 1.0 M KOH, the overpotentials are 261 and 188 mV at 10 mA cm(-2), and Tafel slopes are 103 and 92 mV dec(-1), respectively. Meanwhile, it owns good cycle stability and durability over 20 h in the whole pH range (0-14). In all solutions, the HER performance of NiSe-Ni3Se2/rGO is better than that of NiSe-Ni3Se2. This is because the rGO substrate accelerates the electron transfer and improves the electrical conductivity, increasing HER activity of catalyst. (C) 2021 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.