Reactive Mapping of Transition Metal Catalyst Decoration by Modifiers

改性剂修饰过渡金属催化剂的反应映射

• 批准号: 9102960
• 负责人: James Goodwin, Jr.
• 金额: $ 16.34万
• 依托单位: University of Pittsburgh
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-08-01 至 1994-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9102960&HistoricalAwards=false
• 关键词: Reactive; Mapping; Transition; Metal; Catalyst

This is an investigation of the dispersion of modifiers (potassium and copper) in supported ruthenium catalysts using steady-state isotopic transient kinetic analysis (SSITKA) of the ethane hydrogenolysis reaction. Since this reaction is highly structure sensitive, it can be used to detect modifier- induced disruptions in the surface of the active metal. In fact, from isotopic transients, it is possible to determine directly how the modifier adspecies affects the population of active ensemble sites. Along with the interpretation of SSITKA-derived reactivity distributions of these sites, the project addresses fundamental questions regarding modifier location and modifier dispersion. Catalyst promoters are often used to improve activities and selectivities of industrial catalysts. Despite their wide use, the nature of their influence is unknown, resulting in a lack of a rational basis for selection of modifiers.

本文研究了改性剂的分散性 （钾和铜）在负载型钌催化剂中的应用 稳态同位素瞬态动力学分析（SSITKA） 乙烷氢解反应。 由于该反应是 它结构灵敏度高，可用于检测改性剂， 在活性金属的表面中引起破裂。 在 事实上，从同位素瞬变，有可能确定 直接影响修饰剂adspecies的种群数量 活跃的集合站点。 沿着的是 这些站点的SSITKA衍生反应性分布， 项目解决了有关改性剂的基本问题 位置和改性剂分散。 催化剂促进剂通常用于改善活性， 工业催化剂的选择性。 尽管他们的宽 使用，其影响的性质是未知的，导致 缺乏合理的基础来选择改性剂。