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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 1.

Reported systems using Br mediators for O2 reduction

Anode Cathode
fuel catalyst mediator mediator catalyst ref.
C – Sn4+/Sn2+ Br−/Br2 NOx 70
H2 Pd black TiO2+/Ti3+ 40
H2 Pt – 73