Surface Chemistry of Rocksalt and Spinel 3d Transition Metal Oxides Tailored by Structural and Compositional Methods

内布拉斯加州大学林肯分校的Marjorie Langell教授是由分析和表面化学计划资助的，研究过渡金属氧化物表面的吸附。兰格尔教授建议利用具有良好特性的阶梯表面来扩展她之前的工作。探讨了阳离子价态和配位对表面组成和反应活性的影响。利用高分辨电子能量损失、X射线光电子能谱、俄歇电子和热脱附谱等手段，研究了氙气和水在阶梯状NiO表面上的吸附。氧化物是重要的工业材料，其化学性质由缺陷的存在决定。例如，氧化铁在修复氯碳化物和修复环境中作为催化剂很重要。为了将电子结构和几何结构与反应活性联系起来，制备定义明确的缺陷性质是一个挑战。了解这些表面反应将有助于开发更高效和环境友好的工业过程催化剂。

Professor Marjorie Langell of the University of Nebraska-Lincoln is funded by the Analytical and Surface Chemistry Program to study adsorbates on transition metal oxide surfaces. Professor Langell proposes to utilize well-characterized stepped surfaces to extend her previous work. The effects of cation valence and coordination on surface composition and reactivity will be probed. Xenon and water adsorption on stepped NiO surfaces are probed, for example, utilizing high resolution electron energy loss, x-ray photoemission, auger electron and thermal desorption spectroscopy. Oxides are important industrial materials whose chemical properties are governed by the presence of defects. For example, iron oxides are important as catalysts in remediation of chlorocarbons and remediation in the environment. It is a challenge to prepare well-defined defect properties in order to correlate electronic and geometric structure with reactivity. Understanding these surface reactions will aid in the development of more efficient and environmentally friendly catalysis for industrial processes.