Figure 2From: Synthesis and characterizations of Ni-NiO nanoparticles on PDDA-modified graphene for oxygen reduction reactionTEM images and SAED pattern of Ni-NiO/PDDA-G nanohybrids. (a) The low-magnification image of Ni-NiO/PDDA-G. (b) The high-magnification image of Ni-NiO/PDDA-G. (c) The high-resolution image of Ni-NiO/PDDA-G. (d) The SAED pattern of Ni-NiO/PDDA-G. (e) From left to right: STEM image, Ni element EDS mapping, O element EDS mapping, and the EDS spectrum of STEM-EDS mapping for Ni-NiO/PDDA-G, respectively.Back to article page