Synthesis mechanism and regulation of ZIF hollow carbon monatom catalyst, research progress in the field of ORR

math_shortcuts Up to now, researchers have been dedicated to developing ORR catalysts with high activity and durability. Zeolitic imidazolate frameworks (ZIFs) are an excellent choice as precursors for ORR catalysts due to their high specific surface area and abundant active sites. At present, most review papers mainly concentrate on electrocatalysis and degradation. The distinction of this paper lies in starting with ZIFs themselves. Firstly, the synthesis methods and mechanisms of ZIFs are summarized. Then, it elaborates in depth on how ZIFs form hollow structures and the preparation methods of derived materials. Finally, the development status of different types of hollow ZIF-derived materials in the ORR field is reviewed, and the future development trends and directions are prospected.