fig1

Figure 1. Fabrication and microstructure characterization of Ni_1-xCo_xP@NC composite. (A) The preparation process of rose-like structure Ni_1-xCo_xP@NC; SEM images of (C) NiCo-MOF (C and D) Ni_1-xCo_xP@NC; (E and F) TEM images of Ni_1-xCo_xP@NC; (G) Selected area electron diffraction patterns (up) and enlarged view of the square in Figure 1F (down); (H) Element mapping images of Ni_1-xCo_xP@NC. Ni_1-xCo_xP@NC: N-doped carbon (NC)-coated Ni_1-xCo_xP; SEM: scanning electron microscopy; MOF: metal-organic frameworks; TEM: transmission electron microscopy.