HREELS Investigations of Transition Metal Oxide-Adsorbate Interactions

过渡金属氧化物-吸附质相互作用的 HREELS 研究

• 批准号: 9220341
• 负责人: Marjorie Langell
• 金额: $ 26万
• 依托单位: University of Nebraska-Lincoln
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-03-15 至 1997-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9220341&HistoricalAwards=false
• 关键词: HREELS; Investigations; Transition; Metal; Oxide

This project is in the general area of analytical and surface chemistry and in the subfield of surface vibrational spectroscopy. During the tenure of this three-year continuing grant, Professor Langell and her students will develop and test computational procedures to enhance the applicability of high resolution electron energy loss spectroscopy (HREELS) to the study of adsorbates on transition metal oxides (TMOs). HREELS has proven to be an invaluable tool in the characterization of metal adsorbates. Presently, it is only of limited usefulness for the characterization of adsorbates on TMOs because intense surface phonons from the substrate interfere with the vibrational spectroscopic signals of interest. Professor Langell's approach draws upon the Maximum Entropy Method to develop a phonon deconvolution procedure to remove much of the interfering phonon structure and greatly improve the resolution of TMO-adsorbate HREELS. %%% Attainment of the goals of this project will enable the use of a sensitive vibrational spectroscopic technique (HREELS) for the detailed characterization of adsorbates on TMOs. Such systems are of broad technological importance in chemical catalysis.

这个项目是在一般地区的分析和表面 化学和表面振动光谱学领域。 在这三年的持续资助任期内，教授 兰格尔和她的学生将开发和测试计算 提高高分辨率适用性的程序 电子能量损失谱（HREELS）研究 吸附在过渡金属氧化物（TMO）上。 HREELS已经证明 是一个非常宝贵的工具， 吸附物 目前，它对于 TMO上吸附物的表征，因为强烈的表面 来自基底的声子干扰了 感兴趣的光谱信号。 Langell教授的方法 利用最大熵方法来开发声子 去卷积程序，以消除大部分干扰声子 结构，大大提高了TMO-吸附物的分辨率 HREELS。 %%% 实现本项目的目标将使使用 灵敏的振动光谱技术（HREELS）， TMO上吸附物的详细表征。 这种系统 在化学催化中具有广泛的技术重要性。