Zinc–air batteries (ZABs) are safe, environmentally friendly and stable energy storage devices. However, the two important electrochemical reactions (ORR and OER) in ZABs have high reaction barriers, and thus require the help of a catalyst. At present, the efficient commercial bifunctional catalyst (Pt + RuO₂) has some drawbacks such as high price and poor stability. Thus, it is extremely important to find efficient and inexpensive bifunctional electrocatalysts for ZABs. In this case, zeolitic imidazolate frameworks (ZIFs) are emerging functional materials with highly ordered pore structures and extremely strong catalytic activity, which have attracted much attention due to their high specific surface area, tunable pore size, and structural diversity. Especially, cobalt-containing catalysts derived from ZIFs containing cobalt have excellent bifunctional electrocatalytic properties. Cobalt-containing ZIFs with different amounts of metal possess different synergistic effects and active sites. This review summarizes the preparation and modification methods and active sources of ZIF-derived catalysts containing different amounts of cobalt. Furthermore, we summarized the application of ZIF-derived catalysts containing different amounts of cobalt in ORR and OER. Finally, we briefly discussed the development prospects of ZIF-derived catalysts containing different amounts of cobalt in the field of oxygen electrocatalysis and ZABs.

中文翻译：

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用于锌空气电池的含钴 ZIF 衍生催化剂

锌空气电池（ZAB）是一种安全、环保、稳定的储能装置。然而，ZAB中的两个重要的电化学反应（ORR和OER）具有很高的反应势垒，因此需要催化剂的帮助。目前商业化的高效双功能催化剂(Pt+RuO ₂ )存在价格高、稳定性差等缺点。因此，寻找高效且廉价的 ZAB 双功能电催化剂极为重要。在这种情况下，沸石咪唑酯骨架材料（ZIFs）是一种新兴的功能材料，具有高度有序的孔隙结构和极强的催化活性，由于其高比表面积、可调孔径和结构多样性而备受关注。特别是，由含钴ZIF衍生的含钴催化剂具有优异的双功能电催化性能。不同金属含量的含钴ZIF具有不同的协同效应和活性位点。本文综述了不同钴含量ZIF衍生催化剂的制备、改性方法和活性来源。此外，我们还总结了含有不同钴量的ZIF衍生催化剂在ORR和OER中的应用。最后，我们简要讨论了含不同钴量的ZIF衍生催化剂在氧电催化和ZABs领域的发展前景。