Pr_(1.8)M_(0.2)CoO_4催化剂的性质及对NO+CO催化性能研究  

Study on properties of Pr_(1.8)M_(0.2)CoO_4 catalysts and catalytic performance for NO+CO

作　　者：钟华[1,2] 匡汉茂[1,2] 

机构地区：[1]井冈山大学配位化学省级重点实验室,江西吉安343009 [2]井冈山大学化学化工学院,江西吉安343009

出　　处：《化学研究与应用》2009年第12期1642-1647,共6页Chemical Research and Application

基　　金：江西省教育厅科技计划项目(GJJ09339)资助

摘　　要：采用分解无定形柠檬酸和乙二胺四乙酸聚合体法,合成了Pr1.8M0.2CoO4(M=K,Mg,Ca,Sr,Ba)催化材料,以CO+NO为探针反应,运用XRD、BET、TPR等手段进行表征。结果表明:碱(土)金属掺杂后的Pr1.8M0.2CoO4复合氧化物在950℃焙烧8 h均能形成类钙钛矿型结构;掺入不同碱(土)金属的PrMCoO4复合氧化物在粒子大小、比表面积、B位正三价离子、氧空穴、催化活性等方面存在差异,其中掺入碱土金属Ba的化合物Pr1.8Ba0.2CoO4表现出较好的催化性能。A series of Pr1.8M0.2CoO4 （ M = K, Mg, Ca, Sr, Ba） catalytic materials were successfully synthesized by amorphous citric and ethylene diamine tetraacetic acid complexes decomposition and characterized by means of XRD, BET, TPR. The catalytic performance for CO ＋ NO was investigated. The results showed that Pr1.8M0.2CoO4 mixed oxides adulterated with alkaline-earth metals form perovskite-type structures after being calcined at 950℃ for 8 h. Those Pr1.8M0.2CoO4 mixed oxides adulterated with different alkaline-earth metals have different particle size, specific surface area, trivalent ions at B-site, oxygen vacancy and catalytic activity. The sample Pr1.8M0.2CoO4 adulterated with alkaline-earth metal Ba implied good catalytic activity.

关 键 词：复合氧化物 碱(土)金属 A位掺杂 CO+NO 

分 类 号：O643.36[理学—物理化学]