Fig. 2: Characterization of BVO.

a Lattice fringes obtained from BVO using HR-TEM. b A TEM image of a BVO specimen and the corresponding SAED pattern. c, d SEM images of an RGO/CoOx/BVO specimen. e The C1s XPS peaks of each sample.

a Lattice fringes obtained from BVO using HR-TEM. b A TEM image of a BVO specimen and the corresponding SAED pattern. c, d SEM images of an RGO/CoOx/BVO specimen. e The C1s XPS peaks of each sample.