采用高温热解法成功制备了掺氮碳纳米管包覆FeCo合金颗粒的催化剂FeCo/NCNTs-3∶1。利用透射电子显微镜（TEM）、X射线衍射（XRD）、X射线光电子能谱（XPS）对催化剂进行表征与分析，并对其进行电化学测试。结果表明，该催化剂为中空竹节状碳纳米管结构，利于O₂输送、电解液扩散和电子传递；催化剂中FeCo合金的形成利于提高催化速率；催化剂中含有丰富的Fe/Co-N-C活性位点，利于促进催化反应；FeCo/NCNTs-3∶1对于氧还原反应（ORR）性能的半波电位为0.84 V；对于氧析出反应（OER），在10 mA/cm²电流密度下对应的电位为1.652 V；以其为空气阴极的锌空气电池，开路电压为1.49 V，功率密度为142.41 mW/cm²。

FeCo/NCNTs-3:1 catalyst, in which FeCo alloy particles are coated by nitrogen-doped carbon nanotubes, is successfully prepared via high-temperature pyrolysis method, and characterized and analyzed by using transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and electrochemical testing.It is indicated by the results that the catalyst has a hollow bamboo-like carbon nanotube structure, which facilitates O₂ transport, electrolyte diffusion and electron transfer.The formation of FeCo alloys in the catalyst are favorable for increasing the catalytic speed.The catalyst is rich in Fe/Co-N-C active sites, which facilitates the catalytic reaction.The half-wave potential of FeCo/NCNTs-3:1 is 0.84 V for the oxygen reduction reaction (ORR) performance.As for oxygen evolution reaction (OER), the corresponding potential is 1.652 V at 10 mA·cm^-2 of current density.The zinc-air battery with it as the air cathode has an open-circuit voltage of 1.49 V and a power density of 142.41 mW·cm^-2.

熊子龙(1997-),女,硕士生,研究方向为锌空气电池双功能催化剂的研究,627255119@qq.com