Chemical Reactions of Environmental and Atmospheric Relevance on the Surface of Oxide Particles

这项名为“氧化颗粒表面环境和大气相关化学反应”的研究项目将由爱荷华大学的Vicki Grassian博士进行，并由大气化学和分析与表面化学项目共同支持。本项目的目的是研究发生在氧化物颗粒上的非均相表面化学。特别令人感兴趣的是吸附水对硝酸、二氧化硫和臭氧的吸附和反应动力学的影响。将对这些复杂体系进行光谱和动力学测量。大气中发生的气相反应经常在悬浮气溶胶中存在的颗粒表面催化。特别是，最丰富的微粒包括硅、铝和铁的氧化物。对发生在氧化物颗粒表面的基本气相反应的研究将对大气过程的理解产生直接影响。所获得的数据将有助于建立全球大气化学模型和开发减少危险化学品的环境催化剂。

The research program entitled "Chemical Reactions of Environmental and Atmospheric Relevance on the Surface of Oxide Particles" will be performed by Dr. Vicki Grassian from the University of Iowa and is jointly supported by the Atmospheric Chemistry and Analytical and Surface Chemistry Programs. The goal of this project is to study the heterogeneous surface chemistry occurring on oxide particles. Of particular interest is the influence of adsorbed water on the adsorption and reaction kinetics of nitric acid, sulfur dioxide and ozone. Spectroscopic and kinetic measurements will be made on these complex systems. Gas phase reactions occuring in the atmosphere are frequently catalyzed at the surface of particulates which exist in suspended aerosols. In particular, the most abundant particulates include the oxides of silicon, aluminum and iron. This research into the fundamental gas phase reactions occuring at the surfaces of oxide particles will have direct impact on the understanding of atmospheric processes. The data obtained will be useful for global atmospheric chemistry models and for developing environmental catalysts for the reduction of hazardous chemicals.