Fig. 2: Morphology characterizations of NiSA-Ru@RuO2 NSs/C.

(a) HAADF-STEM image, (b) XRD pattern, (c) SEM-EDS, (d) enlarged TEM image and (e, f) enlarged TEM image of lattice dislocation, (g) local TEM image and related (h) line scan and (i) HAADF-STEM-EDS elemental mappings of NiSA-Ru@RuO2 NSs/C.