Surfactant-aided hydrothermal preparation of La(2-x)Sr_xCuO_4 single crystallites and their catalytic performance on methane combustion

查看全文 作　　者：Lei [1]Zhang;Yue [1]Zhang;Jiguang [1]Deng;Hongxing [1]Dai

机构地区：[1]Laboratory of Catalysis Chemistry and Nanoscience,Department of Chemistry and Chemical Engineering,College of Environmental and Energy Engineering,Beijing University of Technology,Beijing 100124,China

出　　处：《Journal of Natural Gas Chemistry》索引2012年第21卷第1期,共7页

基　　金：supported by the National Natural Science Foundation of China (No. 20973017 and 21077007);the Creative Research Foundation of Beijing University Technology (No. 00500054R4003);the Creative Research Team of Beijing Municipality (No. PHR201007105) 摘　　要：Perovskite-like oxide La2-xSrxCuO4 (x = 0, 1) single crystallites with microrod-like morphologies and tetragonal crystal structures were prepared hydrothermally at 240°C with poly(ethylene glycol) (PEG) or hexadecyltrimethyl ammonium bromide (CTAB) as a surfactant and after calcination at 850°C. The physicochemical properties of the materials were characterized by means of XRD, BET, SEM, TEM/SAED (selected-area electron diffraction), XPS and H2-TPR techniques. It is found that doping Sr2+ to La2CuO4 lattice enhanced the catalytic activity for methane combustion and the LaSrCuO4 catalyst derived from PEG is the best among the tested ones. It is concluded that factors, such as adsorbed oxygen species concentration, reducibility and surface area, determined the catalytic performance of such single-crystalline materials. 关键词：表面活性剂甲烷燃烧催化剂燃烧性能晶粒十六烷基三甲基溴化铵水热法选区电子衍射

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Surfactant-aided hydrothermal preparation of La(2-x)Sr_xCuO_4 single crystallites and their catalytic performance on methane combustion

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