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Figure 8. (A) Illustration of the ammonia-assisted fabrication process of Fe/NG^[146], reproduced from Ref.^[146] with permission. Copyright 2018 Wiley-VCH. (B) Illustration of the ammonia-assisted fabrication process of Cu ADMCs^[140], reproduced from Ref.^[140] with permission. Copyright 2019 American Chemical Society. (C) TEM, (D) EDS element mapping, and (E) aberration-corrected HAADF-STEM images of Cu-G^[147], reproduced from Ref.^[147] with permission. Copyright 2019 Elsevier. (F) Illustration of the transformation of pyridinic FeN₄ to pyrrolic FeN₄ by ammonia treatment, and (G) C K-edge and N K-edge XANES spectra od HP-FeN₄ and FeN₄^[12], reproduced from Ref.^[12] with permission. Copyright 2020 Royal Society of Chemistry. (H) Illustration of the fabrication process of Fe-NO/NC assisted by NH₄Cl^[148], reproduced from Ref.^[148] with permission. Copyright 2020 American Chemical Society. (I) Illustration of a universal two-step method for the fabrication of ADMCs^[61], reproduced from Ref.^[61] with permission. Copyright 2021 Springer Nature.