Fig. 2: The synthesis and structural characterization of the Ru–N–In/NC catalyst.
From: Asymmetric Ru-In atomic pairs promote highly active and stable acetylene hydrochlorination

a and b TEM images of the Ru–N–In/NC moiety and the corresponding EDS mappings for Ru, In, and N, respectively. c Powder XRD patterns of Ru–N–In/NC, RuN4/NC, InN4/NC, and NC. d AC-HAADF-STEM image of the Ru–N–In/NC sample, in which the single-atom Ru–In pairs are highlighted by the yellow circles/boxes. e Atomic scale identified the distance (nm) of isolated Ru and In dual single-atom sites in the selected area with yellow rectangles 1, 2, and 3 in figure (d).