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. 2022 Apr 14;10:835832. doi: 10.3389/fchem.2022.835832

FIGURE 8.

FIGURE 8

Crystal structure of defects and adsorbates at the ZnS (220) surface: single sulphur vacancy (A), single zinc vacancy (B), adsorption of NaBH4 on the pristine (220) surface (C), adsorption of NaBH4 on a (220) surface where a single sulphur vacancy is present (D).