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Preparation of Nano-carbon Materials with High Orderity and Application of It As Support Material for Fuel Cell Catalysts

Author: LiYuPeng
Tutor: LiaoShiJun
School: South China University of Technology
Course: Applied Chemistry
Keywords: Nano-carbon material Chemical vapor deposition method Carrier Catalyst Fuel cell
CLC: TB383.1
Type: Master's thesis
Year: 2011
Downloads: 77
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Abstract


Nano-carbon material has good electrical conductivity, thermal conductivity, radiation resistance, and at the same time has a high specific strength, high specific modulus, heat resistance, chemical corrosion, abrasion, good damping, shock absorption, noise reduction, and a series of excellent physical and chemical properties. It is widely used ideal structural and functional materials, and has broad prospects for the use of cutting-edge areas of aerospace, defense and military, as well as many civilian areas. The current widespread use of low-temperature fuel cell catalysts using carbon as carrier material. In specific conditions, the problem of oxidation of the carbon material has become one of the important reasons that affect the durability of the fuel cell. Meanwhile, many researchers have found that: the higher the crystallization degree of the carbon material, the stronger the antioxidant capacity. Therefore, in recent years, the carbon support material has a degree of order has become an important research topic in the field of fuel cell research and development. This thesis prepared several kinds of nano-carbon material having a different structure, the effects of carbon source materials, the influence of the preparation conditions of the structure and properties of the nano-carbon material using a chemical vapor deposition (CVD). 1, propylene as raw material, using a low temperature chemical vapor deposition synthesis of a carbon material having a tacticity microspheres structure, investigated the influence of the the CVD temperature for generating material morphology and yield of carbon microspheres, and the optimum reaction temperature of the resulting product depth characterization. The XRD spectra of the material obtained under optimal conditions with XC-72R is very similar, the specific surface area of ??128.6 m 2 / g. The carrier system obtained using the carbon material of 20 wt.% Pt / C catalyst performance can be comparable to commodity XC-72R as the carrier of the catalyst, for the anodic oxidation of methanol, and its activity up to 364.14 mA / mg Pt. 2, magnesia load iron catalysts (Fe / MgO), to propylene or acetonitrile as the carbon source, the use of chemical vapor deposition method in a certain temperature range, attempts to prepare a carbon nanotube material. The effects of different temperatures and different carbon sources generated carbon nanotubes, as well as the influence of morphology and performance, and optimize the optimum reaction conditions. Investigated the performance of carbon nanotubes as a catalyst carrier, and its structure was characterized. 3, the precursor of xylene as a carbon source, and ferrocene as the catalyst, a catalyst with a carbon source material is co-evaporated planktonic try to adopt a chemical vapor deposition method on a quartz substrate was prepared carbon nanotube material. The effects of different concentrations to generate carbon nanotube morphology and yield, and conducted in-depth characterization of the product obtained and the optimum reaction conditions. XRD spectra of the material obtained under optimal conditions with commercial carbon nanotubes are very similar, the specific surface area of ??137.1 m 2 / g. Using the carbon material as a carrier system was 20 wt-% Pt / CNT-T catalyst performance compared with similar catalysts commercial carbon nanotubes as the carrier, the high activity of the anodic oxidation of methanol, and its activity can be achieved 579.09 mA / mg Pt.

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