氧化物负载纳米金催化葡萄糖选择氧化

通过溶胶-固载法制备了不同氧化物负载的纳米金催化剂，并用于催化葡萄糖选择氧化。系统考察了pH值、反应温度、氧气体积分数、载体等对葡萄糖氧化的影响。结果表明：提高pH值、反应温度和氧气体积分数都有利于促进葡萄糖氧化反应进行；但过高的pH值及反应温度会导致副反应发生，降低葡萄糖酸的选择性；此外，对于不同氧化物负载的纳米金催化剂，结合ICP、BET、In situ DRIFT和TEM等表征可知，除了金纳米粒子尺寸，纳米金与载体间强相互作用也对葡萄糖选择氧化反应活性起重要影响。

Aerobic Oxidation of Glucose Over Gold Nanoparticles Supported on Oxides

Gold catalysts were prepared by sol immobilization method and used to catalyze aerobic oxidation of glucose. The effects of pH value, reaction temperature, oxygen volume fraction and supports on catalytic activities of gold catalysts were carefully studied. It is found that glucose oxidation is promoted by increasing pH value, reaction temperature and oxygen volume fraction. However, side reactions also occur and the glucose acid selectivity decreases when pH value and reaction temperature are too high. In addition, the reaction data achieved over different oxides supported gold catalysts in combination with the characterizations of ICP, BET, In situ DRIFT and TEM indicate that the strong interaction between the metal and support (SMSI) also greatly influences the catalytic activities of oxides supported gold catalysts as well as the size of gold nanoparticles.