制备条件对Au/TiO_2液相氧化反应活性的影响  

Influence of preparation condition on catalytic activity of Au/TiO_2 catalysts for liquid oxidation reactions

作　　者：康宇[1] 屈一新[1] 郭倩玲[1] 王水[1] 王际东[1] 

机构地区：[1]北京市生物加工过程重点实验室北京化工大学化学工程学院,北京100029

出　　处：《工业催化》2010年第2期25-29,共5页Industrial Catalysis

摘　　要：采用沉积-沉淀法制备纳米级Au/TiO_2催化剂,以葡萄糖液相催化氧化制葡萄糖酸为探针反应,考察了催化剂制备条件对Au/TiO_2活性的影响,并利用TEM、XRD和XPS等方法对催化剂进行了表征。结果表明,Au/TiO_2对葡萄糖液相氧化反应的催化活性与催化剂的制备条件密切相关,纳米金的颗粒尺寸不是决定催化活性的惟一因素,金在催化剂中的价态对催化活性有重要影响。Au/TiO2 catalysts were prepared by deposition-precipitation method and influence of preparation condition on their activity was investigated using liquid phase catalytic oxidation of glucose as the probe reaction. The catalysts were characterized by TEM, XRD and XPS techniques. It was found that for liquid phase oxidation reaction of glucose catalyzed by Au/TiO2, activity of the catalysts was closely associated with the preparation condition; size of the nanosized Au particles was not the only influential factor on activity of Au/TiO2 ; valence of Au particles also played an important role.

关 键 词：催化化学 AU/TIO2 制备条件 葡萄糖 液相氧化 活性 

分 类 号：O643.36[理学—物理化学] TQ426.94[理学—化学]