Fig. 1: Structural characterization of Pt1C3-Pt1O1C3/rGO samples.
From: Asymmetric Pt1C3-Pt1O1C3 catalytic pairs for efficient transfer hydrogenation of azobenzene
Low-magnification HAADF-STEM images of Pt1C3-Pt1O1C3/rGO with Pt loadings of 0.5 wt.% (a), 1.0 wt.% (b), 2.5 wt.% (c), 5.0 wt.% (d), and 7.5 wt.% (e). f–j High-magnification HAADF-STEM images highlighting atomically dispersed Pt sites. k–o Magnified HAADF-STEM images with orange boxes indicating representative Pt1C3-Pt1O1C3 pairs. p–t Statistical distribution of the shortest distances (d) between adjacent Pt1C3-Pt1O1C3 pairs for each sample. u–w A representative Pt1-Pt1 CP on rGO imaged by HAADF-STEM with corresponding EELS spectra. x Atomic-scale charge-density mapping by 4D-STEM. Left: HAADF-STEM image reconstructed from the 4D-STEM dataset, resolving a Pt1-Pt1 pair on rGO. Right: Projected charge-density distribution derived from the inverted divergence of the center of mass (dCoM), highlighting the spatial positions of C, O, and Pt atoms. y EDS mapping of Pt1C3-Pt1O1C3/rGO catalysts.
