fig19

Figure 19. (A) Schematic illustration of the preparation process of Co₃O₄, Mn₃O₄ and CN_x supported on 1D carbon nanofibers (Co₃O₄/Mn₃O₄/CN_x@CNFs); (B) LSV curves of Co₃O₄, CNFs, Co₃O₄/CN_x@CNFs, Co₃O₄/Mn₃O₄/CN_x@CNFs and Pt/C for ORR; (C) LSV curves of RuO₂, CNFs, Co₃O₄, Co₃O₄/CN_x@CNFs and Co₃O₄/Mn₃O₄/CN_x@CNFs for OER in 1 M KOH at 1,600 rpm. Reproduced with permission. Copyright 2020, Elsevier^[261].