Figure 1: Structural and elemental analysis of MoS2.
From: Robust carbon dioxide reduction on molybdenum disulphide edges
(a) Optical image of bulk MoS2 used as catalyst (scale bar, 2 mm), (b) Scanning electron microscopy images of the MoS2 displaying the stacked-layered structure and sharp edges of the MoS2 flakes. Scale bars are 50 and 5 μm (for inset), respectively, and (c) high-angle annular dark-field (HAADF) images (scale bar, 5 nm) showing both the 1T (blue) and 2H (red) phases of MoS2, along with their respective Fast Fourier Transforms (FFTs) (inset). (d) Higher magnification HAADF images show clearly distinct atomic configuration corresponding to the 1T (top) and 2H (bottom) type of MoS2. The related schematic atomic models have also been shown on the right side. (e) Raw greyscale HAADF and false-color low-angle annular dark-field (LAADF) image (inset) of MoS2 edges (scale bar, 5 nm) and (f) the line scans (red and blue towards edges) identifying Mo atoms to be the terminating atoms in the general case. In limited instances, an additional light atom (grey line scan) occupying what should be a Mo-position, most probably a carbon atom, from the STEM substrate.
