Fig. 2
Structural characterization of PtSA/S–C and PtNC/S–C. a HAADF-STEM image of PtSA/S–C. Scale bar, 2 nm. b HAADF-STEM image of PtNC/S–C. Scale bar, 10 nm. c High-resolution HAADF-STEM image of PtNC/S–C. Scale bar, 1 nm. d XRD patterns of PtSA/S–C and PtNC/S–C. The standard peaks of Pt are shown in black lines
