Fig. 1: Structural characterization of Pt-ACs/CoNC.

a Schematic illustration of the preparation of Pt-ACs/CoNC. b, c STEM images of Pt-ACs/CoNC. Scale bar, 20 and 2 nm, respectively. d–f Magnified HAADF-STEM image of Pt-ACs/CoNC, its corresponding simulated image and DFT optimized structure. g–h The extracted line profiles along with the red and blue directions. i EDS analysis of Pt-ACs/CoNC, and the inset is the HAADF-STEM image at a low voltage of 60 kV. Scale bar, 5 nm. j STEM-EDS elemental mapping of Pt-ACs/CoNC. Scale bar, 10 nm.