▎ 摘　　要

The search for highly active, durable and low-cost catalysts for hydrogen evolution reaction (HER) is the key to clean energy technology. In this work, we prepare the porous three-dimensional N-doped graphene (3DNG) and apply it as the support of Ni2P/Ni5P4 heterogeneous nanoparticles with a Janus structure to fabricate a novel hybrid catalyst (Ni2P/Ni5P4@3DNG) for the HER. Combining the advantages of interconnected 3D porous structure, high specific surface area and N doping, the HER activity of the prepared hybrid catalyst is greatly enhanced, achieving a low overpotential of 139 mV at -10 mA cm (2) and a good durability in acid medium. This study provides a simple method for designing 3D graphene-based non-noble metal phosphide catalysts with high HER performance. (C) 2021 Elsevier B.V. All rights reserved.