Reaction control with surface nano-structured materials

我们主要研究了以下几个纳米结构材料的应用，包括AgO的准一维表面化合物、纳米石墨烯和铜的纳米层：1。在清洁和氧覆盖的Ag（110）表面上的表面反应。我们阐明了紫外光诱导氧的消除邻苯二甲酸反应的机理如下。该反应是由AgO链的电子激发引发的，激发的AgO与碳化物碳反应形成CO，CO快速氧化产生CO2。Pt（111）上纳米石墨烯的电子结构：这是通过多光子光电子能谱和紫外光电子能谱研究的。我们发现了一个位于费米能级以上4eV的未占据σ* 态，它对氘的修饰非常敏感.甲烷在Pt（111）上的光化学研究我们在Pt（111）上制备了Pt（111）铜薄膜，并研究了甲烷的光化学。反应截面取决于铜层的数量。在单层铜上，光化学类似于Pt（111）上的光化学，并且随着层数的增加逐渐改变为在体铜表面上的光化学。此外，我们还比较了氧覆盖的Pt（111）和清洁的Pt（111）上的光化学反应，发现在没有甲基产物中毒的情况下，有甲氧基生成。

We have investigated mainly the following subjects using nano-structured materials, including pseudo-one dimensional surface compound of AgO, nanographene, and ultrathin layers of copper :1. Surface reactions on clean and oxygen-covered Ag(110) surfaces.We clarified the mechanism of uv-light induced-phbtoelimination reaction of oxygen as follows. The reaction is initiated with electronic excitation of AgO chains, the reaction of excited AgO with carbidic carbon to form CO, and the rapid oxidation of CO to produce CO2.2. Electronic structure of nanographene on Pt(111):This was investigated by multiphoton photoelectron spectroscopy and ultraviolet photoelectron spectroscopy. We identified an unoccupied σ* state located at 4 eV above the Fermi level, which is very sensitive to modification by deuterium.3. Photochemistry of methane on ultrathin copper layers and oxygen modified Pt(111)We prepared ultrathin copper films on Pt(111) and investigated the photochemistry of methane. The reaction cross sections depend on the number of copper layers. On the monolayer copper, the photochemistry resembles to that on Pt(111) and gradually changes to that on bulk copper surfaces as the number of layers increases. In addition, we compared the photochemistry on the oxygen-covered Pt(111) with that on the clean Pt(111) and found that methoxy group is produced and the reaction proceeds without poisoning by methyl product.