通过水热法合成Ni （OH）₂纳米线，与硝酸钴、2-甲基咪唑混合并通过溶液法合成Ni （OH）₂@ZIF-67前驱体，将前驱体在氧气氛围下高温煅烧得到NiO@Co₃O₄催化剂。利用扫描电镜、透射电镜、X射线能谱等分析手段对催化剂的形貌、结构及组成进行分析。通过循环伏安、交流阻抗、计时电流等电化学方法研究了催化剂电催化肼氧化的性能。结果表明，NiO@Co₃O₄成功制备且NiO纳米线镶嵌在Co₃O₄骨架中；NiO@Co₃O₄对肼氧化具有良好的催化活性和催化稳定性，当煅烧温度为300℃时性能最佳。

Ni(OH)₂ nanowires are synthesized through hydrothermal method,and then mixed with cobalt nitrate and 2-methylimidazole to synthesize Ni(OH)₂@ZIF-67 precursor through solution method.The precursor is calcined at high temperature in oxygen atmosphere to obtain NiO@Co₃O₄ catalyst.The morphology,structure and composition of the catalyst are characterized by scanning electron microscopy (SEM),transmission electron microscopy (TEM) and energy dispersive X-ray spectroscopy (EDX).The electrocatalytic performance of the catalyst for hydrazine oxidation is studied by cyclic voltammetry,AC impedance and chronoamperometry.It is shown that NiO@Co₃O₄ is successfully prepared,in which NiO nanowires are embedded in Co₃O₄ framework.NiO@Co₃O₄ is verified to have good catalytic activity and catalytic stability for hydrazine oxidation,and its performance reaches the best when the calcination temperature is 300℃.