fig6

Figure 6. (A) Schematic illustration of the carbon corrosion mechanisms. This figure is quoted with permission from Wan et al.^[99]. (B) Schematic demonstration of three models of Fe-N-C catalysts composed of Fe particles, Fe particles with a carbon layer, and FeN_x sites. This figure is quoted with permission from Choi et al.^[97].(C) Comparison of the quantity of leached metal after 200 cycles AST (O₂ or Ar environment) in alkaline media. (D) The amount of dissolved Fe normalized to the applied electric charge. Relative losses of the power density (PD) at 0.65 V RHE (E) and the Fe content (F) over the Ar-AST-200, O₂-AST-200, O₂-AST-2000, or Ar-AST-2000 procedures. These figures are quoted with permission from Ku et al.^[98].