Co(Pd)CuZnLa/硅藻土催化剂改性共沉淀法制备与表征  

Preparation and characterization of Co(Pd)CuZnLa/diatomite catalysts by modified coprecipitation method

作　　者：刘利平[1] 马晓建[1] 李静[1] 方书起[1] 

机构地区：[1]郑州大学化工与能源学院,河南郑州450001

出　　处：《功能材料》2013年第14期2069-2073,共5页Journal of Functional Materials

基　　金：国家十一五科技支撑计划资助项目(2007BAD66B04);河南省自然科学基础研究资助项目(2010A480005)

摘　　要：添加阳离子表面活性剂CTAB,利用共沉淀法制备了硅藻土负载Co-Cu-Zn-La和Pd-Cu-Zn-La的复合金属催化剂,利用SEM、TEM、XRD、FT-IR、TPR等技术对催化剂的表面形貌、结构及还原性能进行了表征。结果表明,制备的催化剂有丰富孔结构,4～15nm的活性氧化物组分呈200～400nm花状分布,分散良好;制备催化剂经H2程序升温还原后,除有金属单质存在外,可能还有合金生成。Diatomite-supported Co-Cu-Zn-La and Pd-Cu-Zn-La composite metal catalysts were prepared by the modified coprecipitation method of adding cationic surfactant CTAB.The prepared catalysts were characterized by SEM,TEM,XRD,FT-IR,TPR and other techniques in terms of their surface morphology,composition and reduction property.The results show that there are rich pores existed in the prepared catalytic materials,active oxide components of 4-15nm have a good dispersion with flower distribution of 200-400nm.Metallic simple substance and possible alloy can be obtained on the surfaces of the prepared catalysts after temperature-programmed reduced of hydrogen.

关 键 词：负载金属催化剂 表面活性剂 共沉淀法 硅藻土 

分 类 号：O643[理学—物理化学]