Fig. 2

Morphology of the Co2 sample. a TEM image to show the typical morphology; b HRTEM image of the nanoplate in Fig. 2a with the inset of the corresponding SAED pattern; c STEM image and the corresponding EDS element mapping images

Morphology of the Co2 sample. a TEM image to show the typical morphology; b HRTEM image of the nanoplate in Fig. 2a with the inset of the corresponding SAED pattern; c STEM image and the corresponding EDS element mapping images