文献类型：会议论文

英文题名：Nanocasted synthesis of the mesostructured LaCoO3 perovskite and its catalytic activity in methane combustion

作者：Wang, Yangang[1]; Wang, Yanqin[1]; Liu, Xiaohui[1]; Guo, Yun[1]; Guo, Yanglong[1]; Lu, Guanzhong[1]

机构：[1] Lab for Advanced Materials, Research Institute of Industrial Catalysis, East China University of Science and Technology, Shanghai 200237, China

语种：英文

外文关键词：Cobalt compounds - Combustion - Silica - Methane - Catalyst activity - Lanthanum compounds

摘要：Extremely high surface area, mesostructured LaCoO3 perovskite has been synthesized by nanocasting from mesoporous cubic (la3d) vinyl silica. Thus-prepared material was characterized by XRD, TEM, and N2-sorption, and its catalytic property was also tested in methane combustion. The catalytic results demonstrated that thus-prepared mesostructured LaCoO3 perovskite had higher activity than the conventional bulk LaCoO3 perovskite prepared by citrate method. Further analysis showed that both the high surface area and the existence of high valent cobalt ions (Co4, XPS analysis) were contributed to the high activity. Copyright ? 2009 American Scientific Publishers All rights reserved.