STM Study of Industrial Solid Catalysts through the Construction of Model Systems

通过模型系统构建对工业固体催化剂进行STM研究

• 批准号: 06650897
• 负责人: KOMIYAMA Masaharu
• 金额: $ 1.34万
• 依托单位: Yamanashi University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06650897/
• 关键词: Scanning Tunneling Microscopy; Sillica; Alumina; Platinum; Ultrafine Particles; Thin Films; 走査型トンネル顕微鏡; 担持金属触媒

The present research aims at constructing model industrial catalyst systems suitable for STM examinations, thereby advancing STM applications to the examinations of practical industrial catalyst research.As most common industrial catalysts, supported metal catalysts were chosen. Silica and alumina were chosen as support materials, and Pt as metal catalyst component. Model supported metal catalysts composed of these constituents, and their STM images were obtained.STM examinations of nonconductive materials such as silica and alumina were made possible by making them as very thin films. Tunneling mechanism of such thin nonconductive films were also examined. As preparation techniques for the model supported catalysts vacuum deposition was found most varsatile.With the developments of these methodologies, it became possible to obtain information on atom arrangements and local electronic structures of catalyst surfaces that have not been possible with other existing methods. This gives rise to the expectations that heterogeneous catalyst reactions which are highly localized in nature may be examined and understood at atomic level.

本研究旨在构建适合STM检测的模型工业催化剂体系，从而将STM应用于实际工业催化剂的检测。选择二氧化硅和氧化铝作为载体材料，Pt作为金属催化剂组分。由这些组分组成的模型负载型金属催化剂及其STM图像，通过将它们制成非常薄的膜，使非导电材料如二氧化硅和氧化铝的STM检查成为可能。并对这种非导电薄膜的隧穿机理进行了探讨。真空沉积法是制备模型负载型催化剂的最常用方法，随着这些方法的发展，人们可以获得用其他方法所不能获得的催化剂表面原子排列和局部电子结构的信息。这就产生了这样的期望，即在自然界中高度局部化的非均相催化剂反应可以在原子水平上进行检查和理解。

项目成果

M.Komiyama: "Simulation of Atomic Force Microscopy Image Variations along the Surface Normal" Jpn.J.Appl.Phys.34. L789-L792 (1995)

M.Komiyama：“原子力显微镜图像沿表面法线变化的模拟”Jpn.J.Appl.Phys.34。

M.Komiyama: "Atomic Force Microscopy Images of Natural Zeolite Surfaces Observed under Ambient Conditions" Jpn.J.Appl.Phys.33. 3761-3763 (1994)

M.Komiyama：“在环境条件下观察到的天然沸石表面的原子力显微镜图像”Jpn.J.Appl.Phys.33。

M.Komiyama: "Simulation of Atomic Force Microscopy Image Variations along the Surface Normal : Presence of Possible Resolution Limit in the Attractive Force Range" Jpn. J.Appl. Phys.34. L789-L792 (1995)

M.Komiyama：“沿表面法线模拟原子力显微镜图像变化：吸引力范围内可能存在的分辨率极限”Jpn。

M.Komiyama: "Quantum Chemical Approach to the Intepretation of the STM tunneling Mechanism" Catalysis Today. 23. 365-370 (1995)

M.Komiyama：“解释 STM 隧道机制的量子化学方法”《今日催化》。

M.Komiyama: "Construction of Model Supported Metul Catalyst for STM" Journal of Vacuum Science and Techinclogy B. 12. 1869-1871 (1994)

M.Komiyama：“STM 模型支持的 Metul 催化剂的构建”真空科学与技术杂志 B.12. 1869-1871 (1994)