fig8

From: Recent advances in non-precious metal-based carbon materials for enhanced oxygen reduction and evolution reactions in rechargeable zinc-air batteries

Recent advances in non-precious metal-based carbon materials for enhanced oxygen reduction and evolution reactions in rechargeable zinc-air batteries

Figure 8. (A) Illustration of P-Co₃Fe₁/NC-700; (B) ORR/OER catalytic reaction process and optimized adsorption geometry of O₂, ^*OOH, ^*O, and ^*OH on Co₃Fe₁, Co₃Fe₁/700-5, Co₃Fe₁/700-10, and Co₃Fe₁/700-20^[112]; (C) Illustration of ZnMn-NC^[129]; (D) The preparation process of Co₉S₈/NSCP through polymer hierarchical self-assembly, metal-organic coordination and subsequent space-confined pyrolysis; (E) FESEM, TEM and HRTEM image of Co₉S₈/NSCP^[130]. OER: Oxygen evolution reaction; ORR: oxygen reduction reaction; TEM: transmission electron microscopy; HRTEM: high-resolution transmission electron microscopy; FESEM: field emission scanning electron microscopy.