Figure 2. TEM and HRTEM images of Pd/RGO composites with 0.4 mL TOP and 0.5 mL OAm; (a) and (b) TEM images, (c) HRTEM image; (d) XRD pattern of the Pd/RGO composites with 0.4 mL TOP and 0.5 mL OAm.

The results indicated that the Pd NPs with a mean diameter of 3.8 nm were uniformly dispersed on the surface of RGO. Pd NPs formed a self-assembled structure on the surface of the RGO films due to the narrow size distribution.