fig3
Figure 3. (A) The preparation of Ru3/CN[34], Copyright 2017, American Chemical Society; (B) The preparation of Fe2-N-C[36], Copyright 2019 Elsevier Inc; (C) The preparation of FeCoZn-TAC/SNC[49], Copyright 2022, American Chemical Society; (D) The preparation of CoMn-N/C[40], Copyright 2023 Wiley-VCH GmbH; (E) The preparation of FeSAs/N-C and FeACs/NPS-HC[39], Copyright 2023 Wile-VCH GmbH. TAC: Triatomic catalyst.
