铂纳米簇/壳聚糖杂化膜催化苯部分加氢制备环己烯  

Catalytic activity of Pt nano-cluster/chitosan hybrid membrane for partial hydrogenation of benzene to cyclohexene

作　　者：翟豪[1] 张爱清[1] 李琳[1] 刘汉范[1,2] 龙帅[1] 

机构地区：[1]中南民族大学催化材料科学湖北省暨国家民委教育部共建重点实验室,湖北武汉430074 [2]中国科学院化学研究所,北京100190

出　　处：《工业催化》2011年第2期32-35,共4页Industrial Catalysis

基　　金：国家自然科学基金(20774108);湖北省自然科学基金(2008CDB036);材料化学与服役失效湖北省重点实验室(华中科技大学)开放课题(200803)

摘　　要：研究了铂纳米簇/壳聚糖杂化膜(Pt/CS)对液相苯部分加氢反应的催化性能。通过微波加热还原氯铂酸的方法制备了单分散铂纳米簇,并将其与壳聚糖(CS)进行杂化后得到铂纳米簇/壳聚糖杂化膜。利用TEM、FT-IR、XRD和XPS等对铂纳米簇以及杂化膜的结构进行了表征,透射电镜表明,铂纳米颗粒平均粒径为3.7 nm,XPS结果显示,杂化膜中的Pt与壳聚糖上的N和O之间存在一定程度的配位。结果表明,用Pt/CS催化液相苯加氢反应,反应2 h,部分加氢产物环己烯选择性可达68%,单独以Pt纳米簇作催化剂无壳聚糖膜时,无环己烯生成,环己烷是惟一产物。Pt nano - cluster/chitosan hybrid membrane （Pt/CS） was prepared and its catalytic activity for the partial hydrogenation of benzene was investigated. The structure of the catalysts was characterized by TEM, FT-IR, XRD and XPS. TEM and XPS results indicated that the average diameter of Pt particles was 3.7 nm and Pt was coordinated with N and O in chitosan hybrid membrane （CS） to some extent. The experimental results showed that Pt/CS catalyst exhibited high selectivity to Cyclohexene of 68% in liquid-phase benzene hydrogenation for 2 h ;there was no cyclohexene in the product using Pt nano-particles as the catalyst without chitosan membrane and the only product was cyclohexane.

关 键 词：催化化学 杂化膜 铂纳米簇 壳聚糖 苯部分加氢 环己烯 

分 类 号：O643.36[理学—物理化学] TQ426.6[理学—化学]