fig12

Figure 12. (A) Illustration of ISAS-Fe/NC catalyst synthesis; (B) Average j and FEs measured in N₂-saturated 0.1 M PBS solution^[125]. Copyright 2023, Elsevier; (C) TEM image, HAADF-STEM image and corresponding EDS mapping images of single-atom dispersed Fe-N-C; (D) NH₃ yield rate and FE of Fe-N-C catalysts^[126]. Copyright 2023, Springer Nature; (E) Optimized Fe-(O-C₂)₄ sites and N₂ adsorption on Fe-(O-C₂)₄; (F) Dependence of R_NH3 and FE on the applied potentials^[127]. Copyright 2023, Wiley; (G) Polarization fields formed between Fe atoms and MoS₂ boost the N₂ activation; (H) and (I) NH₃ yield rate and FE of Fe-MoS₂ catalysts^[131]. Copyright 2023, Elsevier; (J) Different charge densities of N₂ adsorbed on Pd and PdFe₁; (K) NH₃ yield rate and FE of PdFe₁ catalysts; (L) The comparison of NH₃ yield rate of Pd, PdFe₁ and PdFe_x^[79]. Copyright 2023, Wiley. FE: Faradic efficiency; PBS: phosphate buffer saline; TEM: transmission electron microscopy; HAADF-STEM: high-angle annular dark field scanning transmission electron microscopy.