ABSTRACT The assembly between carbon materials and transition metals has been proved to be a promising way to build electrocatalysts with good activity and stability, especially those with biomimetic metallophthalocyanine bearing M‐N 4 active sites. Herein, through direct pyrolysis of Enteromorpha and subsequent solvent impregnation, we demonstrate the successful synthesis of a composite consisting of electrochemically active iron phthalocyanine and N, S codoped graphene‐like Carbon. This biomass‐derived electrocatalyst is low‐cost and more facile in preparation, and its typical features like biomimetic multi‐shell structure, high specific area, and heteroatom doping enable it to serve as not only a promising cathode material for oxygen reduction reaction (ORR), leading to excellent half‐wave potential of 0.9 V. Further combination of ORR with iodide oxidation reaction (IOR) greatly enhances energy efficiency, as the assembled Zn‐air/iodide hybrid battery (ZAIHB) exhibits high open‐circuit voltage of 1.59 V and gravimetric capacity of 756 mAh g − 1 .
Zeng et al. (Wed,) studied this question.