The Catalytic Oxidation Chemistry of Silver Surfaces

银表面的催化氧化化学

• 批准号: 9003303
• 负责人: A. Brad Anton
• 金额: --
• 依托单位: Cornell University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-09-01 至 1993-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9003303&HistoricalAwards=false
• 关键词: Catalytic; Oxidation; Chemistry; Silver; Surfaces

The objectives of this study are the identification of intermediates in the partial and total oxidations of olefins on silver (110) surfaces, and quantification of the energetics of elementary steps in these processes. This includes, for partial oxidation, the production, identification, and characterization of the metallocycle intermediates relevant to catalytic oxidtion by both atomically and molecularaly adsorbed oxygen, and, for total oxidation , the investigation of the mechanism of propylene combustion. Electron energy loss spectroscopy is used to identify adsorbed intermediates and to measure the rates of reactions in which they participate, and temperature-programmed desorption is used to identify desorption products and to measure the rates of desorption. Partial oxidation of olefins, the process involved in this study, is of great commerical importance, but as presently practiced, can be applied only to a very few olefins. The results of this study could lead to better control and improved yields in the existing process. More significantly, it may point the way for extending this approach to additional olefins, which would represent a technological breakthough.

本研究的目的是确定 烯烃部分和全部氧化的中间体 在银（110）表面上，以及能量学的量化 在这些过程中的基本步骤。 这包括 部分氧化，生产，鉴定， 与以下物质相关的中间体的表征 原子和分子催化氧化 吸附氧，并为总氧化，调查 丙烯燃烧的机理 电子能量 损失光谱用于识别吸附的中间体 并测量反应的速率， 参与，程序升温脱附用于 识别解吸产物，并测量 解吸 烯烃的部分氧化， 研究，是非常重要的，但目前 实践中，只能应用于非常少的烯烃。 的 这项研究的结果可能会导致更好的控制， 提高了现有工艺的产率。 更重要的是， 它可能为将这种方法扩展到其他领域指明了方向。 烯烃，这将代表一个技术突破。