Catalysis by Metals: Dynamics, Kinetics, and Mechanistic Studies

金属催化：动力学、动力学和机理研究

• 批准号: 9981769
• 负责人: W. Henry Weinberg
• 金额: --
• 依托单位: University of California-Santa Barbara
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-05-15 至 2003-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9981769&HistoricalAwards=false
• 关键词: Catalysis; Metals; Dynamics; Kinetics; Mechanistic

The goal of this research is to make quantitative connections between UHV surface studies and applied chemical catalysis. Two related research projects are supported by the Analytical and Surface Chemistry Program in the laboratory of Professor Weinberg at the University of California-Santa Barbara. Studies of the mechanism of energy transfer during chemisorption are pursued using Schottky barrier sensors. Chemisorption of H, O, H2, O2, CO and N2O on transition metal surfaces is examined. The influence of condensed multilayers on surface reactions is also being considered. In particular, possible enhanced reactivity of alkanes in the presence of condensed multilayers is examined on clean and potassium promoted single crystal surfaces of ruthenium, iridium, and platinum. The results of this work will further our understanding of the detailed dynamics of heterogeneous catalysis. The understanding of the catalysis of hydrocarbon and small molecule reactions on transition metal surfaces is the focus of this research project supported in the Analytical and Surface Chemistry Program. Professor Weinberg and coworkers at UCSB are investigating the mechanisms of energy transfer in chemisorption and the effect of condensed multilayers on the reactivity of hydrocarbon molecules at well characterized catalytic surfaces. The information from this research will be useful in designing improved systems for heterogeneous catalysis.

这项研究的目的是在特高压表面研究和应用化学催化之间建立定量的联系。两个相关的研究项目得到了加州大学圣巴巴拉分校温伯格教授实验室的分析和表面化学计划的支持。利用肖特基势垒传感器对化学吸附过程中的能量传递机理进行了研究。研究了H、O、H_2、O_2、CO和N_2O在过渡金属表面的化学吸附。凝聚多层膜对表面反应的影响也被考虑在内。特别是，烷烃在缩合多层存在下可能增强的反应活性在清洁和钾促进的Ru、Ir和Plu单晶表面上进行了研究。这项工作的结果将进一步加深我们对多相催化的详细动力学的理解。了解过渡金属表面上的碳氢化合物和小分子反应的催化作用是分析和表面化学计划支持的这一研究项目的重点。温伯格教授和UCSB的同事正在研究化学吸附中的能量转移机制，以及缩合多层膜对碳氢分子在具有良好特性的催化表面上的反应活性的影响。这项研究的信息将有助于设计改进的多相催化体系。