fig14

Figure 14. (A-1) A scheme of the two-step synthesis of Ti-ZnCoS HSS; (A-2) Illustration of the 2e-ORR activity-selectivity of CoSx, ZnS, ZnCoS, and Ti-ZnCoS HSS; (B) Characterization of Ti-ZnCoS HSS: (B-1) SEM, (B-2) TEM, and (B-3) HADDF-STEM; (C) Free-energy diagram for oxygen reduction to H₂O₂; (D) Schematic illustration for the 2e-ORR process of Ti-ZnCoS HSS catalyst; (E) LSV polarization curves; (F) CV current density vs scan rate; the linear slope is equivalent to the double-layer capacitance (C_dl). Reproduced with permission. Copyright 2022, Wiley Online Library^[198].