ni纳米线管阵列担载ptpd催化剂的研究

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'ni纳米线管阵列担载ptpd催化剂的研究'
AbstractProton exchange membrane fuel cells, especially the direct elcohol fuel cells become the most favorable mobile power supply for various types of equipment and attracted a lot of research focus in recent years due to the low operating temperature, high safety and high efficiency. The efficiency and cost of the catalyst of fuel cells are very important to the application and popularization, but the catalyst Pt is expensive. The preparation and its application of Ni ordering carrier membrane electrode were studied because of the advantage of ordering membrane electrode in structure, and performance of the performance of the related catalyst was studied too.Electrochemical anodic oxidation method was used to produce the anodic aluminum oxide (AAO) template. The solution composition and related technology of the anodic oxidation was studied to prepare the AAO template, of which, the hole density was 1.5 X 108/m2. The diameter of the holes was about lOOnm, and the thickness of the holes was about 30nm?The pretreatment technology and conditions of chemical nickel plating, chemical nickel plating additive, and the electroplating nickel process conditions were determined, and the AAO template with diameter of 100 nm and 250 nm were used to make the Ni nanowire arrays and Ni nanotubes arrays. The Ni plate and Ni nanowires/nanotubes arrays were studied as electrodes by cyclic voltammetry in alkaline solution to determine the behavior of the catalytic oxidation of ethanol, and the results showed that the specific surface area of Ni nanowires/nanotubes arrays were much greater than that of Ni plate electrode.The loading method of Pt, Pd, Pt-Pd catalyst on to Ni nanowires/tubes arrays supports was studied. The catalyst with ideal morphology was prepared by adjusting the solution composition and operating time, using substitution reaction. It was found that Pt and Pd were distributed uniformly on the Ni nanowires/tubes arrays SEM. The ICP test showed that the load of Pt and Pd were both below 0.8 mg/cm2.Cyclic voltammetric behavior of catalyst in alkaline solution, and the catalytic ability to ethanol oxidation reaction were studied. Results showed that the catalyst with Ni nanowires/nanotubes arrays had larger specific surface area, and Ni nanotubes arrays was better than Ni nanowire arrays as the support of catalyst. The catalytic ability of ethanol oxidation in the alkaline solution of Pd was better than that of Pt, but it's opposite for the intermediate oxidation. The Pt-Pd composite catalyst loaded on the Ni nanowires/tubes arrays had both good catalytic activity,and intermediate oxidation ability.Keywords: nanotube, catalyst, support, ethanol, intermediate products目录摘要 IAbstract II第1章绪论 11」课题背景及研究的目的和意义 11.2燃料电池概况 1121燃料电池的种类与应用 2122质子交换膜燃料电池工作原理 31.3质子交换膜燃料电池催化剂 31.3.1碳载钳催化剂的缺陷 41.3.2催化剂改性与新型催化剂的研究 41.4阳极氧化铝模板的研究与应用 81.4.1 AAO模板的制备方法与原理 81.4.2 AAO模板在纳米线/纳米管制备制备中的应用 101.5本课题的研究内容 13第2章 实验材料及测试方法 152
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ni 纳米 线管 阵列 ptpd 催化剂 研究
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