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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 6.

Reported systems using NOx species as mediators for O2 reduction.

Anode Cathode
Fuel catalyst mediator mediator catalyst ref
MeOH or HO(CH2)2OH Pt – HNO3 124–127
H2 Pt/C – 128–129