fig10

Figure 10. (A) Preparation and proposed formation mechanisms of Co@diamondized MOF; (B) five possible models of atomic Co-N₄ configurations with different defect degrees; free energy diagrams of the models in (B), calculated at (C) U = 0 V (vs. SHE) and (D) U = 0.83 V (A-D reproduced with permission from Wiley-VCH, copyright 2021)^[153]; (E) Preparation, (F) EXAFS R-space fitting curve, and (G) model of CoN₄ configuration in NP-Co_SANC; (H) LSV curves, (I) Overall polarization curves. (E-I reproduced with permission from Elsevier, copyright 2023)^[154]. MOF: Metal-organic framework; EXAFS: extended X-ray absorption fine structure; LSV: linear sweep voltammetry.