High cost, scarcity, and detrimental environmental effect of the noble-metal based catalysts have prompted the seek of less expensive, more benign, and earth abundant substitutes for energy conversion and storage. Here, we demonstrate a novel multifunctional electrocatalyst constructed by pyrolysis of the complex of polyaniline (PANI) and metal organic framework [Co-based MOF; zeolitic imidazolate framework (ZIF-67)]. The resultant PANI/ZIF-67 complex unveiled excellent electrocatalytic activities towards oxygen reduction reaction (ORR), oxygen evolution reaction (OER), and hydrogen evolution reaction (HER) in alkaline medium. It was found that the catalytic activities of the PANI/ZIF-67 complex towards ORR, OER and HER could be tuned by simple changing the weight ratio of PANI to the MOF. Further, we tested the material as an air electrode for a primary zinc-air battery, demonstrating an open-circuit potential of 1.42 V and a peak power density of ~ 45 mW cm⁻² - both are superior to those of its counterpart of the Pt/C air-electrode. The excellent multifunctional catalytic activities of the PANI/ZIF-67 are mainly attributed to the synergistic combination of cobalt nanoparticles, Co₃O₄, and nitrogen doped carbon from the PANI/ZIF-67 complex after pyrolysis.

贵金属基催化剂的高成本，稀缺性和有害的环境影响促使人们寻求更便宜，更良性和土壤丰富的替代品来进行能量转换和存储。在这里，我们展示了一种新型的多功能电催化剂，该催化剂通过热解聚苯胺（PANI）和金属有机骨架的复合物[Co-based MOF; 沸石咪唑酸酯骨架（ZIF-67）]。所得的PANI / ZIF-67配合物对碱性介质中的氧还原反应（ORR），氧释放反应（OER）和氢释放反应（HER）具有出色的电催化活性。发现通过简单地改变PANI与MOF的重量比可以调节PANI / ZIF-67配合物对ORR，OER和HER的催化活性。进一步，^-2-两者均优于其Pt / C空气电极的对应物。PANI / ZIF-67出色的多功能催化活性主要归因于热分解后钴纳米颗粒，Co ₃ O ₄和来自PANI / ZIF-67络合物的氮掺杂碳的协同结合。