水滑石负载Au纳米粒子的制备及其催化醇氧化反应  

Au Nanoparticles Supported on a Layered Double Hydroxide with Excellent Catalytic Properties for the Aerobic Oxidation of Alcohols

作　　者：王亮[1] 孟祥举[2] 肖丰收[2] 

机构地区：[1]吉林大学无机合成与制备化学国家重点实验室,吉林长春130012 [2]浙江大学催化研究所,浙江杭州310028

出　　处：《催化学报》2010年第8期943-947,共5页

基　　金：国家自然科学基金(20973079);国家重点基础研究发展计划(973计划;2009CB623507)

摘　　要：采用离子交换法和NaBH4还原法制备了Mg-Al-水滑石(LDH)负载的Au纳米粒子(Au/LDH)催化剂.X射线衍射和透射电镜结果表明,Au粒子较均匀地分散在水滑石表面,载体仍保持层状结构.在温和的反应条件下,Au/LDH对一系列醇的氧化反应表现出优异的催化性能,如在室温常压下进行分子O2氧化1-苯基乙醇的反应,底物转化率和苯乙酮选择性都接近100%,而且催化剂经过多次循环使用后,其活性未见下降.可见,Au/LDH催化剂在醇氧化反应中具有良好的应用前景.Au nanoparticles supported on Mg-Al-layered double hydroxide （Au/LDH） were successfully prepared by ion-exchange and reduction.XRD patterns and TEM images indicate that the Au nanoparticles are highly dispersed on the LDH support,and that the layered structure remains intact during the preparation process.Interestingly,Au/LDH shows high catalytic activity for the aerobic oxidation of alcohols under mild conditions.For example,the conversion of 1-phenylethanol and selectivity for acetophenone was nearly 100% using molecular oxygen as an oxidant under atmospheric pressure at room temperature.The Au/LDH composite exhibits high catalytic stability during these reactions,and therefore,it has great potential for industrial application.

关 键 词：金 纳米粒子 水滑石 醇 氧化 分子氧 

分 类 号：O643.32[理学—物理化学]