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中文摘要：
模型催化研究能够更好认识催化过程，指导催化剂的合成．在TiO2（110）单品上制备了VOx膜，采用俄歇电子能谱（AES）、低能电子衍射（LEED）、高分辨电子能量损失谱（HREEI．S）考察其结构和物理化学性质，及VTiO2相互作用和热稳定性．结果表明，真空蒸着法制备的V／TiO2（110）界面发生明显的氧化还原作用，出现了VOx和低价Ti，暴露O2后低价Ti即被氧化回＋4价，表面发生重构恢复到（1×1）．在O2氛同中制备的VO2／TiO2（110）结构和V的价态会随覆盖度的增加发生变化，利刖这种制备方法制备的VO2／TiO2（110）具有较多缺陷位，低温退火（≤600K）可使结构变得更规整。
英文摘要：
Model catalyst study can help to understand the catalytic process, guide the synthesis of more e{ficient catalysts. The rood el catalysts comprised of V or vanadia deposited onto TiO2（110） surface was studied. The structure and physical chemistry properties of the VO,/TiO2 （110）, as well as the interaction between V and TiOz and their thermal stability were investigated by high resolution electron energy loss spectroscopy （HREELS）, Auger electron spectrum （AES） and low energy electron diffraction （LEEI））. Oeposi- tion of metallic V onto Ti（）2 （110） surface resulted in charge transfer from V to TiO2 at the interface in which the V atoms were oxi dized and the Ti4＋ cations were reduced; when metallic V deposited was exposed to 02 ,Ti2＋ was oxidized to Ti4 again,and the structure of the surface restored. VOx/TiO2 （110） produced by reactive evaporation under O2 atmosphere at room temperature may possess some defects,which would become a better ordered structure after annealing. The structure and valence of V changed with the increase of the coverage.
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