Dissertation > Excellent graduate degree dissertation topics show

The Preparation of Pt and Cu2O Nano Films and Their Catalytic Property Analysis

Author: SuXu
Tutor: WangChunMing
School: Lanzhou University
Course: Analytical Chemistry
Keywords: Grain layer Immersion deposition Electrodeposition Porous silicon Methanol oxidation Cuprous oxide Photoelectric effect
CLC: TB383.1
Type: Master's thesis
Year: 2009
Downloads: 100
Quote: 1
Read: Download Dissertation

Abstract


Journal on a porous silicon (PS), and a conductive glass substrate (ITO), was successfully prepared Pt and Cu 2 O nanomembranes; with an atomic force microscope (AFM), scanning electron microscopy (SEM) study the system of film material the morphology characteristics: X-ray diffraction (XRD) and energy dispersive X-ray energy dispersive spectroscopy (EDX) analysis of the elemental composition and crystal properties of thin film materials; using cyclic voltammetry (CV), linear voltammetry (LSV), open-circuit potential (OCP), the current ~ time (Amperometric i ~ t), AC impedance (IMP) electrochemical analysis prepared by the electrochemical properties of the film material and deposition mechanism; systematically to study the application prospects of the film in electrochemical catalytic. The main contents are as follows: 1 by chemical plating (Electroless deposition or chemical deposition) principle and the p-Si (100) sheet as a substrate, using immersion deposition (Immersion deposition) technique, the surface of the substrate first successfully obtained Ag, Au, Pd and Pt grain layer; with an atomic force microscope (AFM), the open circuit potential (OCP) and the AC impedance (ACImpedance) Methods The prepared grain-layer surface morphology, electrochemical characteristics of the system characterization and study. The results show, Ag, Pd, and Au metal deposition 60s can completely cover the base, can be used as a grain layer; Pt deposition amount is small, can not be used as a grain layer. Ag, Pd and Au as the use of the grain layer, shall refer to the actual needs consideration. 2 using immersion deposition techniques, the first successful Pt nanoparticles is prepared in the surface of the porous silicon film. X-ray diffraction (XRD), energy dispersive X-ray energy dispersive spectroscopy (EDX) and scanning electron microscopy (SEM) to characterize the composition and morphology of the film. The results show that the prepared Pt nano-film having a smaller particle size and larger surface area. The catalytic activity of the film were studied by cyclic voltammetry (CV) that prove that when the deposition time of more than 24 min, the film has good catalytic activity for methanol oxidation. Sodium citrate (Na 3 C 6 H 5 O 7 ) buffer solution with a constant potential deposition surface preparation in conductive glass (ITO) p-type nano semiconductor cuprous oxide (Cu 2 O) films. The field emission scanning electron microscope (FE-SEM), X-ray diffraction (XRD) and cyclic voltammetry (CV) film morphology and composition analysis; photochemical film technology using open circuit potential - time (Ocpt ~ t) The nature of the characterization. The results showed that the morphology and composition of the films was significantly affected by the influence of the deposition potential and solution pH, prepared films are ideal for photoelectric conversion effect. Analysis of thin film deposition mechanism and catalytic mechanism.

Related Dissertations

  1. Methyl sulfonate system tin plating additives and process,TQ153.13
  2. Eutectic ionic liquid solvent-based system to take the study of metallic zinc from zinc oxide,TF813
  3. Nanocomposite Coatings pulse electrodeposition preparation process and performance,TG174.4
  4. Preparation and Microstructure of Nano-crystalline Zn-Ni Alloy by Jet Electrodeposition,TG174.4
  5. Study on Preparation and Performance of Potocatalytic Degradation of Cuprous Oxide Powder and Film,TB383.2
  6. Study on New Electrodeposition Processes of Aluminum Alloys and Stainless Steel,TQ153
  7. Study on Belt-type ZnO Photoanode for Dye-sensitized and Quantum-dot Sensitized Solar Cells,TM914.4
  8. Study on Preparation and Mechanism of Mg-Li-Sm、Al-Li-Sm、Al-Li-Y Alloys by Electrolysis in Molten Salts,TF82
  9. Study on Preparation and Mechanism of Ba-Li and Zn-Ba-Li Alloys by Electrolysis in Molten Salt,TF826.3
  10. Research on Aluminum Electrodeposition Using AlCl3-BMIC Ionic Liquid under High Gravity Field,TF821
  11. Basic Research on Cu and Ni Oxide’s Direct Alloying in Bof Process,TF713
  12. CNT direct methanol fuel cell catalysts containing platinum-based electricity,TM911.4
  13. Research on Preparation of Cu-coated Graphite Powders with Ultrasonic Flow Electroplating Copper,TQ153.14
  14. Chemically modified electrodes based on nano- materials research and application,O657.1
  15. Electrochemical Fabrication of Au, Pt/self-doped Polyaniline Nanohybrids and Their Applications in Electrochemical Sensors,TB383.1
  16. Palladium on carbon fiber chain silver alloy nanoparticles Preparation and Hydrogen Sensing Properties,TB383.1
  17. Biosynthesis and Characterization of Mesoporous Phosphate with Multimorphology and Oxide Microspheres,TB383.4
  18. Fe-based binary, ternary alloy properties and behavior of electrodeposited,TG131
  19. Copper -catalyzed C-N coupling reaction and the C = N Reaction,O643.32
  20. Study on the Fabrication and Properties of One-dimensional TiO2 Composite,TB383.1
  21. Synthesis and Characterization of printed electronic nano - metals and their oxides,TB383.1

CLC: > Industrial Technology > General industrial technology > Materials science and engineering > Special structural materials
© 2012 www.DissertationTopic.Net  Mobile