fig10

Figure 10. (A) Schematic illustration of the fabrication process and structure of the N,P-GCNS bifunctional oxygen electrocatalyst; (B) LSV curves of various catalysts at a rotation rate of 1,600 rpm; (C) K-L plots of N,P-GCNS at different potentials. (Inset) Electron transfer number (n) of various catalysts at different potentials; (D) Bifunctional catalytic activity of various catalysts toward both ORR and OER. Reproduced with permission. Copyright 2015, ACS Publications^[141]; (E) Schematic illustration of the synthetic process; (F) The dependences of onset and half-wave potentials, and percentages of different types of N sites on the carbonization temperatures for the N/S/O-OMCs. Reproduced with permission. Copyright 2021, Elsevier^[146].