Probing Structural Effects on the Surface Chemistry of Pt-Group IV Bimetallics

探究 Pt-IV 族双金属表面化学的结构效应

• 批准号: 0213583
• 负责人: Bruce Koel
• 金额: $ 48万
• 依托单位: University of Southern California
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-08-15 至 2006-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0213583&HistoricalAwards=false
• 关键词: Probing; Structural; Effects; Surface; Chemistry

This research project addresses the effect of atomic scale structure and composition on the reactivity of bimetallic alloy surfaces for catalytic processes. With the support of the Analytical and Surface Chemistry Program, Professor Koel and his co-workers in the Department of Chemistry at the University of Southern California, use scanning tunneling microscopy, X-ray photoelectron diffraction, and ion scattering spectroscopy to examine the structure, composition and morphology of Pt-Sn, Pt-Ge, and Pt-Ti alloy surfaces. This information is correlated with small molecule catalytic activity on these surfaces, using temperature programmed desorption and infrared spectroscopy to monitor the surface reaction kinetics. Information obtained from these studies improves our fundamental understanding of catalysis on complex heterogeneous surfaces. Atomic scale structural and compositional information is correlated with surface reaction kinetics in these studies, carried out in the laboratory of Professor Bruce Koel at USC. The identification of the reactive site for catalytic processes on alloy surfaces is the goal of this work. Fundamental insight into the operation of catalytic surfaces is obtained from these studies.

本研究项目旨在研究原子尺度、结构和组成对催化过程中双金属合金表面反应性的影响。在分析和表面化学计划的支持下，南加州大学化学系的Koel教授和他的同事们使用扫描隧道显微镜、X射线光电子衍射和离子散射光谱来研究铂-锡、铂-锗和铂-钛合金表面的结构、成分和形貌。这一信息与这些表面上的小分子催化活性相关联，使用程序升温脱附和红外光谱来监测表面反应动力学。从这些研究中获得的信息提高了我们对复杂多相表面上催化作用的基本理解。在这些研究中，原子级结构和成分信息与表面反应动力学相关，这些研究是在南加州大学布鲁斯·科尔教授的实验室进行的。识别合金表面催化过程的反应位置是这项工作的目标。从这些研究中获得了对催化表面操作的基本见解。