STUDY OF CATALYTIC BEHAVIOR OF PEROVSKITE-TYPE MIXED OXIDES La_(1-x)Sr_xFeO_(3-λ)(Ⅰ)——RELATIONS OF SOLID STRUCTURE AND DEFECT CHARACTER WITH CATALYTIC BEHAVIOR 期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

STUDY OF CATALYTIC BEHAVIOR OF PEROVSKITE-TYPE MIXED OXIDES La_(1-x)Sr_xFeO_(3-λ)(Ⅰ)——RELATIONS OF SOLID STRUCTURE AND DEFECT CHARACTER WITH CATALYTIC BEHAVIOR

作者姓名：	于涛吴越吕光烈李旺荣林炳雄

作者单位：	Changchun Institute of Applied Chemistry，Academia Sinica，Changchun Institute of Applied Chemistry，Academia Sinica，Chemistry Department，Peking University，Chemistry Department，Peking University，Chemistry Department，Peking University

摘要：	According to X-ray structure analysis, it was found that there exist oxygen disordered defects in the crystal lattice of the samples without exception as x was changed from 0 to 1 in La_(1-x)Sr_xFeO_(3-x). With the doping of Sr~(2+), the crystal lattice was distorted extremely, even the crystal type varied. The results of TG showed a large amount of lattice oxygen released under high temperatures as x>0.5 in the samples. After comparison between the experiment results of the three systems La_(1-x)(Ca, Sr)_xMO_(3+x) (M=Mn, Fe and Co), it was concluded that the occurrence of solid defects is affected by the geometric factor and the catalytic activity is related to the concentration and the ordering extent of oxygen defects.
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