簡易檢索 / 詳目顯示

研究生: 曹書睿
Tsao, Shu-Tui
論文名稱: 2-氟乙醇在Ni(111)表面上的熱反應與吸附位向的研究
Thermal Chemistry and Adsorption Orientation of 2-Fluoroethanol on Ni(111)
指導教授: 林榮良
Lin, Jong-Liang
學位類別: 碩士
Master
系所名稱: 理學院 - 化學系
Department of Chemistry
論文出版年: 2010
畢業學年度: 98
語文別: 中文
論文頁數: 60
中文關鍵詞: 2-氟乙醇熱反應吸附位向表面程式控溫反應/脫附反射吸收紅外光譜
外文關鍵詞: Ni(111), 2-fluoroethanol, thermal chemistry, adsorption orientation, surface, TPR/D, RAIRS
相關次數: 點閱:76下載:1
分享至:
查詢本校圖書館目錄 查詢臺灣博碩士論文知識加值系統 勘誤回報
  • 本篇論文是以程序控溫反應/脱附(temperature- programmed reaction/desorption, TPR/D)和反射吸收紅外光譜(reflection absorption infrared spectroscopy, RAIRS) 探討超高真空系統中,FCH2CH2OH於乾淨及有氧覆蓋的Ni(111)表面的熱化學、吸附位向及反應中間物。FCH2CH2OH在乾淨的Ni(111)表面會分解形成氫氣及CO脫附。在約180 K~200 K的溫度範圍內,FCH2CH2OH分子的C-F和O-H鍵會斷裂並在表面生成(-CH2CH2O-)的中間物,此Oxametallacycle可在280 K穩定存在。
    FCH2CH2OH在有氧覆蓋的Ni(111)表面除了分解形成氫氣及CO脫附外,還有乙醛和CO2。隨著曝露量的增加這些產物的相對量會先增加後減少。我們推測FCH2CH2OH於170 K在表面開始形成FCH2CH2O-。當溫度超過300 K,FCH2CH2O-中間物會轉變成Oxametallacycle(-CH2CH2O-)。

    Temperature-programmed reaction/desorption (TPR/D) and reflection absorption infrared spectroscopy (RAIRS) have been employed to investigate the adsorption geometry and thermal reactions of FCH2CH2OH on bare and oxygen-preadsorbed Ni(111) in an ultra-high vacuum system. The C-F and O-H bonds of FCH2CH2OH dissociate on Ni(111) in the temperature range ~180-200 K, forming -CH2CH2O- . This oxametallacycle is stable at 280 K, however it decomposes to form CO2 and H2 at higher temperature.
    On oxygen-precovered Ni(111), FCH2CH2OH decomposes to form acetaldehyde and CO2 in addition to H2 and CO. The relative yields of these products increase and then decrease with increasing the exposure. FCH2CH2OH on O/Ni(111) starts to decompose at ~170 K by OH-bond scission, generating FCH2CH2O- , which exists stably at 280 K. When the temperature is raised higher than 300 K, this intermediate transforms to the oxametallacycle (-CH2CH2O-).

    第一章 緒論.................................................1 1.1 表面化學的發展..........................................1 1.2 表面的定義及Ni(111)表面..................................2 1.3 真空的定義及應用.........................................3 1.4 表面吸附的形式..........................................4 1.5 研究動機............................................... 5 第二章 表面研究之分析技術.................................... 9 2.1 歐傑電子能譜(Auger Electron Spectroscopy)...............9 2.2 程式控溫反應/脫附 (Temperature Programmed Reaction/Desorption)....................14 2.3 反射吸收紅外光譜(Reflection-Absorption Infrared Spectroscopy).......................16 第三章 實驗系統與方法.......................................18 3.1 超高真空系統...........................................18 3.2 單晶表面清潔方法及有氧表面的製備..........................20 3.3 藥品及其前處理.........................21 第四章 結果與討論............................23 4.1 FCH2CH2OH在Ni(111)表面上的程序控溫反應/脫附(TPR/D)研究...23 4.2 FCH2CH2OH在Ni(111)表面上的反射式吸收紅外光譜(RAIRS)研究...38 第五章 結論...............................................57 5.1 FCH2CH2OH在乾淨Ni(111)表面上的研究...............57 5.2 FCH2CH2OH在有氧覆蓋的Ni(111)表面上的研究........57 參考文獻...................................................58

    1. H. KAWANOWA, H. OZAWA, T. YAZAKI1, Y. GOTOH and R. SOUDA. "Structure Analysis of Monolayer Graphite on Ni(111) Surface by Li+-Impact Collision Ion Scattering Spectroscopy" Jpn. J. Appl. Phys. 41, 6149, 2002.
    2. X. L. Zhou, J. M. White, "Adsorption and decomposition of methyl halides on Ni(100): A TPD, SIMS and AES study" Surf. Sci. 194, 438, 1988.
    3. S. Tjandra, F. Zaera, "Thermal Chemistry of Dihalopropanes on Ni(100) Single-Crystal Surfaces: Formation of Cyclopropane, Propene, and Propane" J. Phys. Chem. B. 101, 1006, 1997.
    4. K. B. Myli, V. H. Grassian, "Adsorption and Reaction of Trifluoromethyl Iodide on Ni(111) " J. Phys. Chem. 99, 5581, 1995.
    5. K. B. Myli, V. H. Grassian, "Reactions of Trifluoromethyl Iodide on Ni(100) " J. Phys. Chem. 99, 1498, 1995.
    6. S. M. Gates, J. N. Russell, Jr. and J. T. Yates, Jr. "Bond activation sequence observed in the chemisorption and surface reaction of ethanol on Ni(111) " Surf. Sci. 171, 111, 1986.
    7. J. Xu, X. Zhang, R. Zenobi, J. Yoshinobu, Z. Xu and John T. Yates, Jr. "Ethanol decomposition on Ni(111): observation of ethoxy formation by IRAS and other methods" Surf. Sci. 256, 288, 1991.
    8. N. Gleason, J. Guevremont, F. Zaera, "Thermal Chemistry of 2-Propanol and 2-Propyl Iodide on Clean and Oxygen-Pretreated Ni(100) Single-Crystal Surfaces" J. Phys. Chem. B. 107, 11133, 2003.
    9. M. Mavrikakis, Mark A. Barteau, "Oxygenate reaction pathways on transition metal surfaces" J. Mol. Catal. A : Chem. 131, 135, 1998.
    10. Q. Zhao, F. Zaera, "Adsorption and Thermal Conversion of 2-Iodoethanol on Ni(100) Surfaces: Hydroxyalkyls and Oxametallacycles as Key Intermediates during the Catalytic Oxidation of Hydrocarbons" J. Phys. Chem. B. 107, 9047, 2003.
    11. Q. Zhao, R. Deng, F. Zaera, "Formation of an Oxametallacycle Surface Intermediate via Thermal Activation of 1-Chloro-2-methyl-2-propanol on Ni(100) " J. Phys. Chem. C. 114, 7913, 2010.
    12. 陳嘉淵碩士論文, "2-鹵化乙醇在Cu(100)表面上的熱化學研究" 國立成功大學化學所, 5, 2002.
    13. J. C. Vickerman, "Surface Analysis-The Principle Techniques" John Wiley& Sons, New York, 43, 1997.
    14. J. C. Vickerman, "Surface Analysis-The Principle Techniques" John Wiley& Sons, New York, 99, 1997.
    15. G. Ertl, J. Kuppers, "Low Energy Electrons and Surface Chemistry" Verlag Chemie, Germany, 22, 1974.
    16. 林敬二, 林宗義, 儀器分析(下), 美亞書版, 384, 1994.
    17. M. Purtton, "Surface Physis, Oxford University Press" 1983.
    18. 李明羲碩士論文, "超高真空系統的建立 & CH3CN 在 Cu(100) 的吸附研究" 國立成功大學化學所, 23, 2001.
    19. J. C. Vickerman, "Surface Analysis-The Principle Techniques" John Wiley& Sons, New York, 278, 1997.
    20. N. R. Gleason, F. Zaera, "Thermal Conversion of 2-Propyl Iodide on O/Ni(100): Changes in Product Distribution with Varying Oxygen Coverages" Journal of Catalysis. 169, 365, 1997.
    21. P. H. Holloway, J. B. Hudson, "Kinetics of the reaction of oxygen with clean nickel single crystal surfaces: I. Ni(100) surface" Surf. Sci. 43, 123, 1974.
    22. J. A. Slezak, B. D. Zion, S. J. Sibener, "Enhanced oxidation rate of Ni(111) by atomic oxygen" Surf. Sci. 442, L983, 1999.
    23. R. J. Madix, T. Yamada, S. W. Johnson, "The modification of surface reactivity by sulfur ; effects on dehydrogenation of ethanolamine, rthylene glocol, and acetaldehyde on Ni(100) " Appl. Surf. Sci. 19, 43, 1984.
    24. P. Buckley, P.A. Giguère, D. Yamamoto, "Infrared studies on rotational isomerism. II. 2-Fluoroethanol" Canadian Journal of Chemistry 46, 2917, 1968.
    25. E. Wyn-Jones, W. J. Orville-Thomas, "The IR spectra and structure of XCH2CH2OH molecules" J. Mol. Structure. 1, 79 , 1967.
    26. C. Y. Chen, P. T. Chang, K. H. Kuo, J. J. Shih, J. L. Lin, "Thermal Decomposition and Adsorption Orientation of 2-Fluoroethanol on Clean and Oxidized Cu(100)" J. Phys. Chem. B. 107, 10488, 2003.
    27. K. Hagen, K. Hedberg, "Conformational analysis. III. Molecular structure and composition of 2-fluoroethanol as determined by electron diffraction" J. Am. Chem. Soc. 95, 8263, 1973.
    28. J. Huang, K. Hedberg, "Conformational analysis. 13. 2-Fluoroethanol. An investigation of the molecular structure and conformational composition at 20, 156, and 240 ℃. Estimate of the anti-gauche energy difference" J. Am. Chem. Soc. 111, 6909, 1989.
    29. M. Perttilä, J. Murto, A. Kivinen, K. Turunen, "Fluoroalcohols — XXV. Matrix i.r. spectrum and normal coordinate analysis of 2-fluoroethanol" Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy. 34, 9, 1978.
    30. J. R. Roy, M. A. Laliberte, S. Lavoie, M. Castonguay, P. H. McBreen, "Adsorption states of acetaldehyde and butane-2,3-dione on Ni(111) " Surf. Sci. 578, 43, 2005.

    下載圖示 校內:2015-07-28公開
    校外:2015-07-28公開
    QR CODE