Three-Dimensional Graphene-Based Nanomaterials as Electrocatalysts for Oxygen Reduction Reaction

Figure 6

SEM images of (a) bare 3D graphene substrate before modification with metal nanoparticles and (b) 3D graphene after modification with Pt NPs using electrodeposition at 0.4 V for 750 s (reproduced from [50] with permission of the Royal Society of Chemistry).

(a)

(b)