fig10

Figure 10. (A) Schematic illustration of the preparation of carbon cloths (CCs). (B) The type of nitrogen functional groups and atomic content in the melamine attached CC and N-doped CCs with increasing annealing temperature. (C) Constant current charge-discharge voltage curves. (D) Schematic presentation of N-doped configurations. zigzag (z-GNR), armchair (a-GNR) graphene nanoribbon; N-G: graphite nitrogen-substituted graphene base surface; MV: monovacancy defect; z-Hole: zigzag-terminated hole defect; a-Hole: armchair-terminated hole defect. (E) The ORR volcano plot for the active sites mentioned above as a function of the Gibbs formation energy of the OH^* intermediate from water (ΔG_OH*). (Reproduced with permission^[104]. Copyright 2020, American Chemical Society).