单层型氧化铁催化剂的制备及其前体的表征Ⅱ．催化剂前体的表征  

PREPARATION OF MONOLAYER FERRIC OXIDE CATALYSTS AND CHARACTERIZATION OF THEIR PRECURSORS Ⅱ.CHARACTERIZATION OF THE CATALYST PRECURSORS

作　　者：季伟捷[1] 沈师孔[1] 李树本[1] 王弘立[1] 

机构地区：[1]中国科学院兰州化学物理研究所OSSO国家重点实验室

出　　处：《Chinese Journal of Catalysis》1994年第6期444-450,共7页催化学报（英文）

摘　　要：用三种方法，即草酸络铁（Ⅱ）酸铵的过量水溶液含浸、三乙酸丙酮铁的甲苯溶液热吸附和硝酸铁溶液饱和浸渍法制备了多种载体上氧化铁的负载样品．对用不同方法制备的催化剂前体中表面铁物种的存在形式、结构和分散度等进行了细致的表征和详细的讨论，并与焙烧后样品中Ｆｅ３＋的最终形态进行了关联．hree methods were adopted to prepare the supported ferric oxideon various supports. Extensive characterization was done on the precursors of these systems. The formation of the intermediates after dipping,impregnation or batch adsorption and the change of these intermediatesafter calcination were carefully investigated. The structure as well asthe dispersion state of the surface Fe species on various supports werediscussed in detail. It was found that the AcAc- group participated inthe formation of the surface complex after the batch adsorption on various supports. The similar process occurred only on ZrO2 and TiO2 whendipping method was used. The original Fe complex on MgO and ZnOdisintegrated, and the ferric ion was fixed on support via the formationof the intermediate compound. The results from thermal analysis supported the deductions.

关 键 词：氧化铁催化剂 催化剂前体 制备 

分 类 号：TQ426.81[化学工程]