Figure 1

(a) Scanning electron microscope (SEM) and high-resolution TEM (HRTEM) (inset) images of graphene aerogel (GA). (b) SEM image of Ru particles functionalized GA (Ru-GA). (c) Transmission electron microscopy (TEM) and HRTEM (inset) images of Ru-GA. (d) Pore size distribution of Ru-GA.