类球形Ce-Cu(x)-O纳米晶体簇催化性能及表征  

The catalytic activities and characterization of Ce-Cu(x)-O nanocrystal clusters with similar spherical structures

作　　者：单文娟[1] 魏玲玲[1] 董晓薇[1] 刘畅[1] 

机构地区：[1]辽宁师范大学化学化工学院,辽宁大连116021

出　　处：《大庆石油学院学报》2011年第2期82-85,121,共4页Journal of Daqing Petroleum Institute

摘　　要：采用溶剂热法经乙二醇水解,制备Ce-Cu(x)-O纳米晶体簇,电镜照片显示Ce-Cu(x)-O纳米晶体簇具有类似球形结构并且分散均匀.通过改变铜含量制备一系列样品,对样品进行BET、XRD、H2-TPR等表征.结果表明:XRD结果显示当n(Cu)/n(Ce)低于0.1时,只检测到立方相CeO2的晶相衍射峰;当n(Cu)/n(Ce)为0.3时,可以检测到微弱的CuO衍射峰,说明该体系中Cu具有较高的分散性.该系列样品对CO催化氧化反应中具有较高的催化活性,在130℃左右CO的转化率为50%.Ce-Cu(x)-O nanocrystal clusters were obtained via a hydrolysis process in glycol.TEM images show the samples have similar spherical structures and disperse evenly.A series of materials with different Cu content was characterized by BET,XRD and H2-TPR.When n(Cu)/n(Ce) mole ratio is less than 0.1%,XRD results show that only cubic phase of CeO2 diffraction peaks,with increasing it up to 0.3%,weak diffraction peaks of CuO can be detected,indicating that the Cu is finely dispersed on ceria.The catalysts exhibit high catalytic activities CO oxidation,in about 150 ℃ to obtain 50% conversion rate of CO.

关 键 词：二氧化铈 铜 Ce-Cu(x)-O纳米晶体簇 一氧化碳氧化 类球形结构 

分 类 号：TQ426.8[化学工程]