fig1
Figure 1. Synthesis process and structure characterizations of Ni1/NC. (A) Schematic illustration of the synthesis process for Ni1/NC; (B) Low-magnification HAADF-STEM image; (C) EDS element mapping, and (D and E) AC HAADF-STEM images of Ni1/NC. NC: Nitrogen-doped carbon; HAADF-STEM: high-angle annular dark-field scanning transmission electron microscopy; EDS: energy-dispersive X-ray spectroscopy; AC: aberration correction.
