La_(1-X)Sr_xMnO_3催化剂的制备及其催化甲烷燃烧性能研究  

Synthesis of Perovskite-type La_(1-X)Sr_xMnO_3 Catalysts and Investigation on Their Catalytic Activity of Methane Combustion

作　　者：郑建东[1] 唐骏[2] 侯豹[2] 葛秀涛[2] 

机构地区：[1]滁州学院材料与化学工程学院 [2]滁州学院材料与化学学院

出　　处：《滁州学院学报》2013年第2期73-76,共4页Journal of Chuzhou University

基　　金：安徽省教育厅自然科学研究重点项目(KJ2012A213);滁州学院校级重点教研项目(2011jyz007);安徽省应用化学省级重点学科建设(200802187C);安徽省教育厅教研项目(2012jyxm534);滁州学院大学生科研项目(2012xs17)

摘　　要：以催化甲烷燃烧为目标反应,采用共沉淀法制备一系列Sr2+部分掺杂La3+的钙钛矿型催化剂La1-XSrXMnO3(x=0.0,0.2,0.4,0.6,0.8,1.0),通过XRD,BET,DSC-TG和TPR等实验技术,对催化剂的结构和性质进行了考察,制备出催化性能好的催化剂。考察了Sr掺杂量多少对催化剂结构及催化甲烷燃烧活性的影响。结果表明:催化剂在600℃焙烧6h后可以形成完整的钙钛矿晶型,同时具有较高的催化性能。不同量的Sr掺杂对于催化剂的性能有较大的影响,Sr离子对Mn离子存在着一定程度的协同作用。由于Sr的加入使催化剂的活性降低。A series of perovskite--type catalysts, La1-xSrxMnO3 （x=0. 0, 0. 2, 0. 4, 0. 6, 0. 8, 1.0） were prepared by co-precipitation method for methane combustion. The properties and structure of these samples were characterized by XRD, BET, DSC--TG, TPR and methane catalytic combustion. Then choose the catalyst which has the best catalytic activity. The effect of Sr substituting La on the structure and methane combustion activity of La1-xSrxMnO3 catalysts was investigated. The results showed that the catalyst with good crystallinity was obtained after calcination under oxygen at 600℃ for 6h. These catalysts also have the high catalytic activity. The introduction of different Sr has much effect on the properties of catalysts. The results show that the Sr ion and Mn ion exist certain degree of synergism. So the Sr led to lower activity of catalysts.

关 键 词：甲烷燃烧 钙钛矿型催化剂 催化活性 锶掺杂 

分 类 号：O643[理学—物理化学]