▎ 摘　　要

As a promising candidate to replace Pt in hydrogen evolution reaction (HER), ruthenium phosphide catalysts have shown excellent performance and attract increasing attention. However, it is still a challenge to control the particle sizes of RuPx were on the supports. In this study, the Schiff-based networks with 3D rigid organic networks are successfully grown on graphene, and the obtained composite was used as a new support for the RuPx. This composite can not only provide more metal coordinating sites but also restrict the growth of RuPx. Therefore, ultra-small RuPx nanoparticles are uniformly dispersed via a subsequent phosphating and pyrolysis process. The final RuPx/JNPG catalyst exhibits low overpotentials at the current density of 10 mA cm(-2) (32 mV in 0.5 M H2SO4 solution, 13 mV in 1 M KOH solution, and 50 my in 1 M PBS solution). This work provides a new strategy to solve the aggregation problem of the metal phosphides on the substrate by introducing Schiff-based networks into the graphene. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.