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. Author manuscript; available in PMC: 2021 Apr 22.
Published in final edited form as: Chem Rev. 2020 Mar 27;120(8):3749–3786. doi: 10.1021/acs.chemrev.9b00717

Table 5.

Reported systems using iron-based mediators for O2 reduction.

Anode Cathode
fuel catalyst mediator mediator catalyst ref
Zn – – Fe2+/Fe3+ charcoal 114
H2 Pt/C – Fe(pc) 61
K3Fe(CN)6 Mn complex 118
Fc species Fe complex 119–123