Real-Time Analysis of Surface Reaction by X-Ray Photoemission Electron Microscope

X 射线光电电子显微镜实时分析表面反应

• 批准号: 08454176
• 负责人: IWASAWA Yasuhiro
• 金额: $ 5.38万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 无数据
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08454176/
• 关键词: X-ray Photoemission Electron Microscope; Scanning Tunneling Microscope; Reflection Absorption Infrared Spectroscopy; Surface Reaction; Solid Surface; Catalyst; In-Situ Analysis; Visualization; 固体表層

The goal of this project is to observe reaction on solid surface in-situ by X-ray photoelectron emission microscope. We have disigned and constructed a X-ray photoelectron emission microscope (XPEEM). By adding a Wien filter for energy selection of X-ray excited photoelectron to an existing low-energy electron microscope (LEEM), it is possible to image the spatial distribution of a particular element at a particular chemical shift on a solid surface. A spatially-resolved total photoelectron image of a silicon wafer and energy spectrum of Au (4f) emission have been successfully observed with the microscope.As the optimization of the XPEEM,surface reaction at titanium oxide and silicon oxide model catalysts has been observed in-situ by scanning tunneling microscope (STM) and reflection absorption infrared spectroscopy (RAIRS). By combining those techniques with XPEEM,the real-time visualization of surface reaction will be achieved.

本课题的目的是利用x射线光电子发射显微镜原位观察固体表面的反应。设计并制作了一台x射线光电子发射显微镜（XPEEM）。通过在现有的低能电子显微镜（LEEM）上添加用于x射线激发光电子能量选择的维恩滤光片，可以在固体表面上对特定元素在特定化学位移下的空间分布进行成像。用该显微镜成功地观察了硅片的空间分辨全光电子像和Au （4f）发射能谱。作为XPEEM的优化，利用扫描隧道显微镜（STM）和反射吸收红外光谱（RAIRS）对氧化钛和氧化硅模型催化剂的表面反应进行了现场观察。将这些技术与XPEEM相结合，可以实现表面反应的实时可视化。

项目成果

Ken-ichi Fukui: "CO Adsorption and Oxidation on (110) -c (4×2) -O by Reflection-Absorption lnfrared Spectroscopy" Journal of Physical Chemistry. 100. 18795-18801 (1996)

Ken-ichi Fukui：“反射吸收红外光谱法对 (110) -c (4×2) -O 的 CO 吸附和氧化”物理化学杂志 100。18795-18801 (1996)

Hiroshi Onishi: "Molecularly-Resolved Observation for Anisotropic lntermolecular Force in a Formate-lon Monolayer on a TiO_2 (110) by Scanning Tunneling Microscopy" Colloids and Surfaces A. 109. 335-343 (1996)

Hiroshi Onishi：“通过扫描隧道显微镜对 TiO_2 (110) 上甲酸盐单层中的各向异性分子间力进行分子分辨观察”胶体和表面 A. 109. 335-343 (1996)

Hiroshi Onishi: "Atom-Resolved Observation of Na Ensembles Activating CO_2 Adsorption on a TiO_2 (110)-(1x1) Surface as the Genesis of Basic Sites" Catalysis Letters. 38. 89-94 (1996)

Hiroshi Onishi：“原子分辨观察 Na 系综激活 TiO_2 (110)-(1x1) 表面上的 CO_2 吸附作为碱性位点的起源”催化快报。

Kiyotaka Asakura: "Direct Observation of Spatiotemporal Patterns on Pt Surface and Its Chemical Control" Hyoumen-Kagaku. 17. 194-200 (1996)

Kiyotaka Asakura：“Pt 表面时空图案的直接观察及其化学控制”Hyoumen-Kagaku。

W.J.Chun: "Three-dimensional Structure of Mo Oxides on TiO_2(110) by Polarization Dependent Total Reflection Fluorescence XAFS" J.de Phys.(in press).

W.J.Chun：“通过偏振相关全反射荧光 XAFS 研究 TiO_2(110) 上钼氧化物的三维结构”J.de Phys.（出版中）。