fig2

Figure 2. (A) AC-HAADF-STEM image of Fe_SAs/g-C₃N₄; (B) The conversion of NO₃^--N and FE of NH₃ using Fe_SAs/g-C₃N₄; (C) N product distributions in the presence of chlorine; (D) Differential charge density of NO₃^- adsorbed on Fe_SAs/g-C₃N₄. This figure is quoted with permission from Song et al.^[57]; (E) TEM image of Fe SAC; (F) FE_NH3 using Fe SAC at different applied potentials; (G) The DOS of the FeN₂O₂ and FeN₄ with Fermi level; (H) The Fe d orbitals of FeN₂O₂ and FeN₄ with d-band center. This figure is quoted with permission from Zhang et al.^[58]; (I) TEM and enlarged images (Inset) of Fe-N/P-C catalyst; (J) FE_NH3 of Fe-N/P-C catalyst by applying different working potentials. This figure is quoted with permission from Xu et al.^[59]; (K) HAADF-STEM image of the S-doped Fe SAC; (L) Cycle FEs and half-cell EEs of S-doped Fe SAC at -0.47 V vs. RHE. This figure is quoted with permission from Liu et al.^[60]; (M) TEM image of Fe-TiO₂; (N) The yield rates of NH₃ generation using Fe-TiO₂ using different working potentials; (O) The optimized structure models of TiO₂ and Fe-doped TiO₂. This figure is quoted with permission from Wang et al.^[61].