多级孔La0.9Ce0.1Fe1-xCoxO3的制备、表征及对CO+NO的催化活性  

Preparation,Characterization and Catalytic Activity for CO+NO of Hierarchical Porous LaCeFeCoO

作　　者：王梦雪 王丽[1] 王颖[1] 姜秋伶 丁浩翔 Wang Mengxue;Wang Li;Wang Ying;Jiang Qiuling;Ding Haoxiang(Faculty of Material Science and Chemical Engineering,Ningbo University,Ningbo 315211,China)

机构地区：[1]宁波大学材料科学与化学工程学院,浙江宁波315211

出　　处：《中国稀土学报》2020年第4期451-459,I0001,共10页Journal of the Chinese Society of Rare Earths

基　　金：国家自然科学基金项目(21607086);浙江省公益技术研究社会发展项目(2016C33024);宁波市科技计划项目(2017C50031,2017A610061,2016C51025)资助。

摘　　要：以三嵌段共聚物PEG-PPG-PEG(P123,M=5800)为软模板合成了6个多级孔钙钛矿型氧化物La0.9Ce0.1Fe1-xCoxO3(x=0,0.2,0.4,0.6,0.8,1.0),用XRD,SEM,BET,XPS对其进行表征,并测试了样品对CO+NO的催化活性。结果表明:在B位进行Co掺杂,催化剂的形貌及物化特性发生了显著变化。Co掺杂量在x=0.2时,样品La0.9Ce0.1Fe0.8Co0.2O3的比表面积、孔容和表面B位金属含量最大,催化活性最佳,在反应温度为276,242℃时分别对CO,NO的转化率达到90%。Six hierarchical porous perovskite-type oxide La0.9Ce0.1Fe1-xCoxO3(x=0,0.2,0.4,0.6,0.8,1.0)were prepared by using triblock copolymer PEG-PPG-PEG(P123,M=5800)as soft template,characterized by XRD,SEM,BET and XPS.The catalytic activity of the samples for CO+NO was tested.The results showed that the morphology and physicochemical properties of the catalysts change markedly when Co is doped at the B site.When the Co doping amount is x=0.2,the specific surface area,pore volume and surface B-site metal content of the sample La0.9Ce0.1Fe0.8Co0.2O3 are the largest,and the catalytic activity is optimal.When the reaction temperature is 276 and 242℃,the conversion rate of CO and NO reach 90%.

关 键 词：钙钛矿 软模板法 P123 CO+NO 稀土 

分 类 号：O643.36[理学—物理化学]