Fig. 2. Microstructural characterization of Ni3Zn and Ni3ZnC0.7.
STEM images of Ni3Zn/oCNT (a) and Ni3ZnC0.7/oCNT (b), the right-top insets are the corresponding particle size distribution diagrams. HRTEM images of Ni3Zn (c) and Ni3ZnC0.7 (d). The top-right and bottom-right insets correspond to the FFTs and unit cells. e–f The atomic model overlapped with the HRTEM images acquired from the dashed box in c, d. High-resolution STEM images of Ni3Zn (g) and Ni3ZnC0.7 (h) with the corresponding EDX elemental mapping of Ni (red), Zn (purple), and C (green). i The integrated intensities of Ni3Zn and Ni3ZnC0.7 perpendicular to the (11−1) and (200) planes. j C K-edge EEL spectra of oCNT and Ni3ZnC0.7. Scale bars: 50 nm in a, b and 2 nm in c, d, g, h.