氧化石墨负载金催化剂在以O2为氧源的苯甲醇氧化反应中的催化性能:载体效应

对石墨氧化物经过加热处理和化学处理后担载金溶胶从而制备得到不同的Au/GO催化剂.利用X-射线光电子能谱，热脱附谱和拉曼光谱对催化剂的表面物种和结构进行了表征.结果表明，热处理和化学处理对Au/GO催化剂表面含氧物种的浓度、种类以及载体的晶体结构具有显著影响，进而导致催化剂在以O₂为氧源的液相苯甲醇选择氧化反应中的催化活性呈现明显差异.与载体表面含氧物种的浓度和种类这一因素相比，载体结构的有序程度对于Au/GO催化剂的催化活性起到更为重要的决定作用.

Catalytic Performance of Graphite Oxide Supported Au Nanoparticles in Aerobic Oxidation of Benzyl Alcohol: Support Effect

Various Au/GO catalysts were prepared by depositing Au nanoparticles on thermally- and chemically-treated graphite oxide (GO) supports using a sol-immobilization method. The surface chemistry and structure of GO supports were characterized by a series of analytical techniques including X-ray photoelectron spectroscopy, temperature-programmed desorption and Raman spectroscopy. The results show that thermal and chemical treatments have large influence on the presence of surface oxygenated groups and the crystalline structure of GO supports. A strong support effect was observed on the catalytic activity of Au/GO catalysts in the liquid phase aerobic oxidation of benzyl alcohol. Compared to the amount and the type of surface oxygen functional groups, the ordered structure of GO supports may play a more important role in determining the catalytic performance of Au/GO catalysts.