Nanopolyhedral Zn/Fe-NC derived from bimetallic zeolitic imidazole frameworks as an efficient catalyst for the oxygen reduction reaction in an air-cathode microbial fuel cell

The synergistic effect of Zn, N and moderate Fe doping enhances the ORR performance. The maximum power density of the Zn/Fe-NC-0.5 MFC is 1954 ± 20 mW m −2 .