催化剂对碳纳米管及其电化学储能性能的影响

发布时间：2018-06-02 20:04

本文选题：催化剂前驱体 + 碳纳米管　；参考：《功能材料》2016年09期

【摘要】：采用柠檬酸络合法制备出六方晶系结构的LaNiO_3和正交晶系结构的La_2NiO_4 2种催化剂前驱体,运用化学气相沉积法制得2种碳纳米管(CNT)。运用XRD对2种催化剂及其前驱体晶体进行结构分析,运用TEM、孔隙比表面分析仪对2种CNT进行形貌和结构的表征,并将2种CNT分别组装成电化学超级电容器,进行了电化学储能性能测试。研究结果表明,在制备工艺和条件一致的情况下,LaNiO_3与La_2NiO_4在高温下分别还原为具有不同晶面含量的2种金属Ni纳米颗粒催化剂,通过该催化剂都可制备得到CNT,但所得CNT的产率、形貌、孔结构参数以及电化学储能性能都存在较大差异。通过分析得出这样的结论,CNT的产率、形貌和孔结构参数与催化剂有直接的关系,而CNT的形貌和孔结构参数又与其电化学储能性能有直接的关系。
[Abstract]:Two kinds of catalyst precursors, hexagonal LaNiO_3 and orthorhombic La_2NiO_4, were prepared by citric acid complexation method. Two kinds of carbon nanotubes (CNTs) were prepared by chemical vapor deposition. The structure of the two catalysts and their precursors were analyzed by XRD, the morphology and structure of the two kinds of CNT were characterized by TEM, and the two kinds of CNT were assembled into electrochemical supercapacitors. The electrochemical energy storage performance was tested. The results show that under the condition of the same preparation process and the same conditions, LaNiO _ 3 and La_2NiO_4 can be reduced to two kinds of metal Ni nanoparticles with different crystal surface content at high temperature, and the yield of CNT can be obtained by using the catalyst. The morphology, pore structure parameters and electrochemical energy storage performance are all different. It is concluded that the yield, morphology and pore structure parameters of CNT are directly related to the catalyst, while the morphology and pore structure parameters of CNT are directly related to its electrochemical energy storage performance.
【作者单位】：西南交通大学超导与新能源研究开发中心材料先进技术教育部重点实验室;
【基金】：国家自然科学基金资助项目(50907056) 四川省科技支撑项目资助项目(2016GZ0273,2016GZ0275) 四川省科技创新苗子工程资助项目(2014-071) 四川省成都市科技惠民工程资助项目(2014-HM01-00073-SF)
【分类号】：O643.36

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