Kinetics and Mechanisms of Adsorbate - Adsorbate Reactions of Halocarbons and Coadsorbates on Iron Surfaces Studied In Situ

小型有机氯化合物脱氯机理和动力学的研究构成了分析和表面化学计划支持的这一研究项目的重点。将使用独特的脱附和识别反应中间体的仪器来研究氯代碳化物和多氯联苯在模型铁和氧化铁表面上的脱氯。傅里叶变换反射吸收红外光谱和激光解吸傅立叶变换质谱学的结合将提供有关这些重要的表面反应的机理和动力学的信息，这些信息是以其他方式无法获得的。这些信息可能对开发含氯碳氢化合物的环境补救进程产生重大影响。消除土壤和地下水中的卤代烃是一项重要的环境任务。这项由分析和表面化学计划支持的研究使用了一种独特的技术组合，可以识别和量化表面和气相中的反应中间体，以帮助我们加深对固体表面脱卤化化学的理解。这一认识将使我们能够针对这些广泛分布的污染物设计更有效的环境补救办法。

The study of the mechanisms and kinetics of the dechlorination of small organochlorine compounds forms the focus of this research project supported in the Analytical and Surface Chemistry Program. Dechlorination of chlorocarbons and polychlorinated biphenyls on model iron and iron oxide surfaces will be examined using unique instrumentation for desorbing and identifying reaction intermediates. The combination of Fourier-transform reflection absorption infrared spectroscopy with laser desorption Fourier-transform mass spectrometry will provide information about the mechanisms and kinetics of these important surface reactions which can not be otherwise obtained. This information may have a significant impact on the development of environmental remediation processes for chlorine containing hydrocarbons. The elimination of halogen containing hydrocarbons from soils and groundwaters is an important environmental task. The research supported in this project by the Analytical and Surface Chemistry program uses a unique combination of techniques which can identify and quantify reaction intermediates on surfaces and in the gas phase, to help in the development of our understanding of dehalogenation chemistry on solid surfaces. This understanding will enable the design of more effective environmental remediation approaches for these widely dispersed contaminants.