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Preparation of SAzymes by pyrolysis. (A) CNT/FeNC. (a) Pyrrole adsorbed on CNT. (b) Polypyrrole coated on CNT to form CNT/PPy. (c) Metal cations adsorbed on CNT/PPy. (d) Pyrolysis to form CNT/FeNC. (e) Structure of Fe-Nx-C. (f) POD-like activity of CNT/FeNC. [40]. Copyright 2019, Wiley-VCH. (B) Fe–NC SAN [42]. Copyright 2019, Elsevier. (C) PMCS [45]. Copyright 2016, Wiley-VCH. (D) Co/PMCS [46]. Copyright 2020, Wiley-VCH.
