Gold nanoparticles supported on magnesium oxide as catalysts for the aerobic oxidation of alcohols under alkali-free conditions
作者:Vinícius V. Costa、Miguel Estrada、Yulia Demidova、Igor Prosvirin、Vladimir Kriventsov、Rafaela F. Cotta、Sergio Fuentes、Andrey Simakov、Elena V. Gusevskaya
DOI:10.1016/j.jcat.2012.05.009
日期:2012.8
to be efficient heterogeneous catalysts for the liquid-phase oxidation of a wide range of alcohols using molecular oxygen as a sole oxidant in the absence of co-catalysts or additives. The Au/MgO material was prepared through the deposition–precipitation method and characterized by XRD, XPS, XAS, HRTEM, UV–Vis spectroscopy, and N2 adsorption techniques. The formation of gold nanoparticles on the MgO
负载在氧化镁上的金纳米颗粒被证明是在不存在助催化剂或添加剂的情况下使用分子氧作为唯一氧化剂对多种醇进行液相氧化的高效多相催化剂。Au / MgO材料是通过沉积沉淀法制备的,并通过XRD,XPS,XAS,HRTEM,UV-Vis光谱和N 2吸附技术进行了表征。通过原位监测在程序升温还原条件下在MgO表面上金纳米颗粒的形成紫外-可见-质谱。从基于生物质的单萜醇,例如异冰片醇,紫苏醇和香芹酚开始,以良好或优异的产率获得了对香料和制药工业重要的各种羰基单萜。Au / MgO催化剂还可以在无添加剂的情况下,在无碱甲醇溶液中对苄醇进行选择性一锅氧化酯化反应,从而以几乎定量的收率得到苯甲酸甲酯。