层状镨铈氢氧化物衍生纳米片负载金催化甘油氧化性能研究

Catalytic Properties of Glycerol Oxidation Catalyzed by Gold on Layered Praseodymium Cerium Hydroxide Derived Nanosheets

采用低温均相沉淀和冷冻干燥法合成了镨掺杂层状氢氧化铈纳米片(LPr_(x)Ce_(1-x)H),以其为前体通过氨水沉积沉淀和热处理过程制备了LPr_(x)Ce_(1-x)H衍生纳米片负载金催化剂(Au/LPr_(x)Ce_(1-x)O)。利用X射线衍射(XRD)、透射电子显微镜(TEM)、高分辨透射电镜(HRTEM)和H_(2)程序升温还原技术(H_(2)-TPR)对材料的结构、微观形貌、还原特性进行了表征,并考察了Au/LPr_(x)Ce_(1-x)O催化剂在温和(90℃、1atm)条件下催化甘油选择性氧化反应的性能。

Praseodymium doped layered cerium hydroxide nanosheets(LPr_(x)Ce_(1-x)H)were synthesized by means of low temperature homogeneous precipitation and freeze-drying.The LPr_(x)Ce_(1-x)H-derived nanosheet supported gold catalyst(Au/LPr_(x)Ce_(1-x)O)was prepared by ammonia deposition,precipitation and heat treatment.X-ray diffraction(XRD),transmission electron microscopy(TEM),high-resolution transmission electron microscopy(HRTEM)and H2 temperature reduction technique(H_(2)-TPR)were used to characterize the structure,microstructure and reduction properties of the materials.The catalytic performance of Au/LPr_(x)Ce_(1-x)O catalyst for the selective oxidation of glycerol at moderate temperature(90℃,1atm)was investigated.