▎ 摘　　要

Controllable integration of platinum nanoparticles (PtNPs) and a carbonaceous material is a promising strategy to obtain cost-effective and highly efficient nano-catalysts. Three-dimensional (3D) graphene-based aerogel is considered as an ideal catalyst support because it not only possesses the superior properties of graphene, but also can provide a high loading volume with hierarchical 3D porous architectures. In this paper, PtNP-decorated 3D nitrogen-doped graphene aerogel was prepared through a one-pot hydrothermal route for the first time. Compared to PtNP-decorated 3D graphene aerogel or PtNP-decorated 2D graphene, this nanocomposite shows excellent electrocatalytic activity because of the nitrogen doping and 3D porous structure.