直接还原型浸渍与沉淀钴铝催化材料的XPS分析与加氢活性  

XPS analysis and hydrogenation activity of directly reduced cobalt/aluminumbased catalytic materials prepared via impregnation and precipitation

作　　者：邢宇[1] 吴德鹏[1] 薛莹莹[1] 刘振新[1] 李晶晶[1] 方少明[1] 

机构地区：[1]郑州轻工业学院材料与化学工程学院,河南省表界面科学重点实验室,郑州450002

出　　处：《功能材料》2015年第B12期185-188,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(U1204202);河南省科技计划资助项目(124300510041)

摘　　要：为了研究等体积浸渍和共沉淀钴铝系催化材料之表面物相及组成,对直接还原后的样品实施了X射线光电子能谱测试,精细测量了Co2p_(3/2)、Al 2p和O 1s谱峰。XPS数据说明等体积浸渍型钴铝催化材料的表面CoAl_2O_4(非活性成分)比例很少,而共沉淀型钴铝催化材料的表面CoAl_2O_4(非活性成分)却相对较多,因此优选等体积浸渍法制备钴铝系催化材料。分别用FESEM和固定床反应装置测定了催化剂形貌和CO加氢反应转换频率(TOF)。Literature about the XPS studies of directly reduced Co/A1 catalytic materials without calcinations process is sparse. To investigate the surface phases and compositions of cobalt/aluminum-based catalytic materi- als derived from incipient wetness and coprecipitation routes, XPS tests were conducted to the directly reduced samples with detailed measurements upon Co 2p3/2, Al2p and O ls peaks. The XPS data show that CoAl2O4 （i. e, an inactive component） is few on the surface of the incipient wetness sample but is considerable on the sur face of the coprecipitated sample. Thus coprecipitation is chosen as the route for the synthesis of cobalt/alumi- num-based catalytic materials. FESEM and fixed-bed reactor were employed to investigate the morphology and turnover frequencies of CO hydrogenation reaction, respectively.

关 键 词：XPS 钴 铝 CO加氢 催化材料 

分 类 号：TQ426.64[化学工程]