High Throughput Structure Sensitive Surface Chemistry

在这个由化学系化学结构、动力学和机理项目资助的项目中，Andrew J. Gellman（卡内基梅隆大学）、E. Charles H. Sykes（塔夫茨大学）和 David S. Sholl（佐治亚理工学院）将合作开发和应用结构敏感表面化学的高通量研究方法。 实验计划的核心是暴露连续分布的表面取向的弯曲单晶金属表面的制备、表征和研究；即暴露出不同台阶和扭结密度的表面区域。 STM、XPS 和 LEIS 等空间分辨实验工具将用于表征这些表面的局部结构并测量每个点的表面反应动力学。这项工作将解决台阶和扭结密度在几种表面反应中的作用。 补充计算建模工具将用于了解表面取向在表面反应动力学中的作用。 这些方法将极大地加速结构敏感表面化学的研究。 这项工作的影响将是对几种重要的催化表面反应的基本理解的发展。更广泛的影响将包括向高中生进行宣传、让本科生接触研究以及制作供公众观看的表面科学和纳米科学短视频。

In this project funded by the Chemical Structure, Dynamics and Mechanisms Program of the Division of Chemistry, Andrew J. Gellman (Carnegie Mellon University), E. Charles H. Sykes (Tufts University) and David S. Sholl (Georgia Institute of Technology) will collaborate to develop and apply methods for high throughput study of structure sensitive surface chemistry. The core of the experimental program is the preparation, characterization and study of curved single crystal metal surfaces that expose continuous distributions of surface orientations; i.e. regions of the surface that expose different step and kink densities. Spatially resolved experimental tools such as STM, XPS, and LEIS will be used to characterize the local structures of these surfaces and to measure surface reaction kinetics at each point. This effort will resolve the role of step and kink density in several surface reactions. Complementary computational modeling tools will be used to understand the role of surface orientation in surface reaction kinetics. These methods will greatly accelerate the study of structure sensitive surface chemistry. The impact of this work will be development of a fundamental understanding of several catalytically important surface reactions. The broader impact will include outreach to high school students, exposure of undergraduates to research and the development of short videos on surface science and nanoscience for public viewing.