The sluggish kinetics of an air cathode has limited the wide application of zinc-air batteries. As novel powerful electrocatalysts, atomic Fe-N-C materials have attracted immense research interest. However, creating Fe-N-C and Fe 3 O 4 dual-sites catalysts is still challenging. Here, we employ a facile and raw-material-sparse strategy to construct a zeolitic imidazolate frameworks (ZIF)-8-derived N-doped carbon catalyst configured by embedded Fe-N x -C/ Fe 3 O 4 dual sites on highly flexible carbon clothe. By soaking the precursor in the iron solution followed by pyrolysis at an optimized temperature, Fe species can translate into dual sites. Our results reveal that the optimal Fe-NC-950 catalyst displays an impressive quasi-four-electron-transfer oxygen reduction reaction pathway exhibiting half-wave potential (E 1/2 ) of 0.89 V and onset potential (E onset ) of 1.04 V. Moreover, Fe-NC-950 based zinc-air cell reached a high open-circuit voltage of 1.54 V and a power density of 165.0 mW cm À2 . Our results also showed that the trace amount of Zn species inherited from ZIF-8 does not affect the catalyst performance.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.