fig2

Figure 2. (A) Synthesis process of Fe-N₄/Pt-N₄@NC^[63]. Copyright 2021, Wiley-VCH; (B) Preparation and structure illustration of the “carbon islands” of DMASs-CDs (red: O atom, blue: N atom, gray: C atom, green: first metal atom, orange: second metal atom)^[64]. Copyright 2023, National Academy of Sciences; (C) Synthetic scheme of Cu-Co/NC^[65]. Copyright 2023, Wiley-VCH; (D) Schematic illustration of the synthetic processes and structures of AD-Co_xNi_1-x and O-AD-Co_xNi_1-x^[66]. Copyright 2023, Springer Nature. DMASs-CDs: Dynamically stable carbon dots with embedded bimetallic atomic sites.