氮掺杂碳管载钯催化剂的制备及其电催化甘油氧化性能  

Preparation of palladic catalyst borne in nitrogen-doped carbon nanotubes and its oxidation performance for electrocatalysis of glycerol

作　　者：张琳玮 陆晓倩 骆珍 刘阳 ZHANG Lin-wei;LU Xiao-qian;LUO Zhen;LIU Yang(School of Chemical and Biological Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China)

机构地区：[1]兰州交通大学化学与生物工程学院

出　　处：《兰州理工大学学报》2019年第5期73-78,共6页Journal of Lanzhou University of Technology

基　　金：甘肃省青年科技研究基金(1506RJYA067);甘肃省教育厅高等学校科研项目(2015A-065)

摘　　要：通过软模板法制备得到两端封闭的中空管状聚吡咯(PPy-NTs),以其作为前体经过不同温度高温碳化得到含氮碳纳米管(N-CNTs),负载钯金属制备得到了 Pd/N-CNTs电催化剂.通过X射线衍射(XRD)、扫描电镜(SEM)等对催化剂结构、形貌及组成进行表征,使用电化学工作站对催化剂进行对甘油氧化反应的电催化性能研究.结果表明,制备得到的催化剂中,Pd/N-CNTs (800)对甘油氧化的电催化活性最优.Pd/N-CNTs (800)中N-CNTs为两端封闭的中空管状结构,形貌较均一;钯纳米粒子均匀分布在N-CNTs载体上,平均粒径2 ± 0. 2 nm.其对甘油氧化的峰电流值为2. 08 A·mgpd^-1;在一 0. 1 V恒电位下1 800 s时的稳态电流值为0. 59 A·mgpd^-1,是Pd/C催化剂的2. 15倍;表现出了良好的甘油氧化电催化性能.Hollow tubular polypyrrole(PPy) with closed both ends was prepared and then obtained by means of soft template method, then taking them as precursor, the nitrogenconteing carbon nanotubes were obtained by means of high-temperature carbonization at different temperatures, and finally the metal of palladium was borne into them to prepare and obtain the Pd/N-CNTs electrocatalysts. The structure, morphology and com-position of the electrocatalyst were characterized with X-ray diffraction(XRD), scanning electron microscopy(SEM) et al. The electrocatalytic performance of the catalyst for glycerol oxidation reaction was investigated on an electrochemical workstation. The result showed that among the catalysts prepared, the Pd/N-CNTs(800) would exhibit optimal electro-catalytic activity for glycerol oxidation. N-CNTs in Pd/N-CNTs(800) were hollow tubular structure with closed both ends and more uniform morphology;the Pd nanoparticles would be uniformly distributed on the bearer of N-CNTs with average diameter of 2±0.2 nm. Its oxidation peak current density for glycerol oxidation would be 2.08 A·mgpd^-1 under the condition of constant potential of-0.10 V for 1 800 s, the current density would be 0.59 A·mgpd^-1, which was 2.15 times as high as that of the catalyst Pd/C, showing a significant improvement upon the electrocatalytic performance for glycerol oxidation.

关 键 词：软模板法 氮掺杂碳管 电催化剂 甘油氧化 

分 类 号：O643.36[理学—物理化学] TB34[理学—化学]