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Preparation of Trimetallic Composite Nanoparticles PdxNiyFez by a Pyrolysis Method in the Solvent of Ionic Liquids for Ethanol Oxidation Reaction

机译:离子液体在乙醇氧化反应溶剂中热解法制备三金属复合纳米粒子Pd x Ni y Fe z

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Trimetallic composite nanoparticles of PdxNiyFez ( the nominal atomic ratios of Pd : Ni: Fe are1:1:1,1:1.5:1,1:1:1.5,1:1:3 and 1:0:3, respectively) supported on multi-walled carbon nanotubes(MWCNTs) (denoted as PdxNiyFez/MWCNTs ) have been prepared by a pyrolysis method using roomtemperature ionic liquids (RTILs) of 1-n-Butyl-3-methylimidazolium triflate ([BMIM]OTF) as thesolvent. The structure and morphology of the samples were thoroughly characterized using X-raydiffraction (XRD), scanning electron microscope (SEM) and transmission electron microscopy (TEM).Ethanol oxidation reaction (EOR) was investigated on the as-prepared catalysts by employing cyclicvoltammetry (CV), demonstrating that the largest peak current of EOR was exhibited on thePd1Ni1Fe1.5/MWCNTs coated glassy carbon electrode. The smaller particle size and relatively loweropen circuit electrode potential were thought as the main reasons for the excellent electrocatalysis ofthe Pd1Ni1Fe1.5/MWCNTs toward EOR when compared to other catalysts.
机译:PdxNiyFez的三金属复合纳米颗粒(Pd:Ni:Fe的标称原子比分别为1:1:1,1:1.5:1,1:1:1.5,1:1:3和1:0:3)通过使用三氟甲磺酸1-正丁基-3-甲基咪唑鎓盐([BMIM] OTF)的室温离子液体(RTIL)的热解方法制备了多壁碳纳米管(MWCNT)(表示为PdxNiyFez / MWCNTs)。利用X射线衍射(XRD),扫描电子显微镜(SEM)和透射电子显微镜(TEM)对样品的结构和形貌进行了全面表征。通过循环伏安法对制得的催化剂进行了乙醇氧化反应(EOR)的研究( CV),表明EOR的最大峰值电流出现在Pd1Ni1Fe1.5 / MWCNTs涂层玻璃碳电极上。与其他催化剂相比,较小的粒径和相对较低的开路电极电位被认为是Pd1Ni1Fe1.5 / MWCNT对EOR极好的电催化的主要原因。

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