NiO@Co_(3)O_(4)复合物的制备及其对肼的电催化氧化研究  

Preparation of NiO@Co_(3)O_(4)composite and its application in electrocatalytic oxidation of hydrazine

作　　者：罗明洪[1] 王思洁 LUO Ming-hong;WANG Si-jie(College of Chemistry and Food Science,Nanchang Normal University,Nanchang 330023,China)

机构地区：[1]南昌师范学院化学与食品科学学院,江西南昌330023

出　　处：《现代化工》2022年第11期136-140,共5页Modern Chemical Industry

基　　金：国家自然科学基金(21763019);江西省教育厅科技项目(GJJ202614);南昌师范学院学生科研项目(19XSKY47)。

摘　　要：通过水热法合成Ni(OH)纳米线,与硝酸钴、2-甲基咪唑混合并通过溶液法合成Ni(OH)@ZIF-67前驱体,将前驱体在氧气氛围下高温煅烧得到NiO@Co_(3)O_(4)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@Co_(3)O_(4)成功制备且NiO纳米线镶嵌在Co_(3)O_(4)骨架中;NiO@Co_(3)O_(4)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)nanowires are synthesized through hydrothermal method,and then mixed with cobalt nitrate and 2-methylimidazole to synthesize Ni(OH)@ZIF-67 precursor through solution method.The precursor is calcined at high temperature in oxygen atmosphere to obtain NiO@Co_(3)O_(4) 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@Co_(3)O_(4) is successfully prepared,in which NiO nanowires are embedded in Co_(3)O_(4) framework.NiO@Co_(3)O_(4) 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℃.

关 键 词：ZIF-67 纳米线 NiO@Co_(3)O_(4) 肼 电催化氧化 

分 类 号：TM912[电气工程—电力电子与电力传动]