Surface Chemistry of Radicals

自由基物种的表面化学是西北大学Peter Stair教授小组进行的这项研究项目的重点。 在分析和表面化学计划的支持下，该小组正在研究清洁气相源中产生的碳氢化合物自由基与表征良好的金属和金属氧化物表面的相互作用。 光谱，动力学和同位素标记的研究被用来探测这些表面上的C-C耦合的机制。 甲基自由基氧化也在探索中。 气相自由基反应之间的类比，例如甲基与羟基自由基的相互作用，以及在表面上探测。 许多多相催化反应可能通过自由基反应中间体进行。 然而，我们对这些激进的表面过程的理解非常有限。 在这个研究项目中，一些最先进的光谱和合成方法相结合，以探索涉及自由基参与者的表面反应的机制。 从这些研究中获得的详细信息在设计用于烃精炼的催化材料和工艺化学中是有用的。

The surface chemistry of radical species is the focus of this research project carried out at Northwestern University in the group of Professor Peter Stair. With the support of the Analytical and Surface Chemistry Program, this group is examining the interaction of hydrocarbon radicals produced in a clean gas phase source with well characterized metal and metal oxide surfaces. Spectroscopic, kinetic, and isotope labeling studies are used to probe the mechanism of C-C coupling on these surfaces. Methyl radical oxidation is also being explored. Analogies between gas phase radical reactions, for example methyl interacting with hydroxyl radicals, are probed on the surface as well. Many heterogeneous catalytic reactions are likely to proceed via radical reaction intermediates. Our understanding of these radical surface processes is quite limited however. In this research project, a number of state of the art spectroscopic and synthetic methods are combined to probe the mechanisms of surface reactions involving radical participants. The detailed information obtained from these studies is useful in designing catalytic materials and process chemistries for hydrocarbon refining.