Fig. 2: Structural characterization of π-SnS pre-catalyst.
From: Acidic CO2-to-HCOOH electrolysis with industrial-level current on phase engineered tin sulfide
a,b FESEM images of π-SnS. c XRD patterns of π-SnS (top) and α-SnS (bottom), and the inset of corresponding crystal structures, tin in cyan and sulfur in yellow. d HAADF-STEM image taken in the [101] direction of π-SnS and the inset of FFT pattern. e Magnified HAADF-STEM image taken from the corresponding area in (d) (top), and the simulated microscopic image of π-SnS from [101] direction (bottom). Cyan, tin; yellow, sulfur. f EDS mapping of a π-SnS nanocrystal. g Atomic structures of (110) facet in π-SnS with top view (top) and side view (bottom). h FT-EXAFS spectra for π-SnS and α-SnS at Sn K-edge. i Contour plots of Sn K-edge WT-EXAFS for π-SnS (top) and α-SnS (bottom).
