文献类型：期刊文献

英文题名：LaMnO3 perovskite oxides prepared by different methods for catalytic oxidation of toluene

作者：Zhang, Chuanhui[1,2,3];Guo, Yanglong[1,2];Guo, Yun[1,2];Lu, Guanzhong[1,2];Boreave, Antoinette[3];Retailleau, Laurence[3];Baylet, Alexandre[3];Giroir-Fendler, Anne[3]

机构：[1]E China Univ Sci & Technol, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Res Inst Ind Catalysis, Shanghai 200237, Peoples R China;[3]Univ Lyon 1, CNRS, Inst Rech Catalyse & Environm Lyon, UMR 5256,IRCELYON, F-69626 Villeurbanne, France

年份：2014

卷号：148

起止页码：490

外文期刊名：APPLIED CATALYSIS B-ENVIRONMENTAL

收录：;EI(收录号：20135117101177);WOS:【SCI-EXPANDED(收录号:WOS:000332431500052)】；

基金：This work was financially supported by National Basic Research Program of China (2010CB732300, 2013CB933201), National High Technology Research and Development Program of China (2011AA03A406) and 111 Project (B08021), Universite Lyon 1 and CNRS. The authors gratefully acknowledge China Scholarship Council for the Joint-Training Scholarship Program with Institut de fa. Recherches sur la Catalyse et l'Environnement de Lyon (IRCELYON) and Universite Claude Bernard Lyon 1(UCBL1).

语种：英文

外文关键词：Perovskite; Sol-gel synthesis; Toluene oxidation; Low-temperature reducibility; Surface adsorbed oxygen

摘要：Perovskite-type oxides of LaMnO3 (LMO) were synthesized by citrate sol-gel (SG), glycine combustion (GC) and co-precipitation (CP) methods, respectively. The physicochemical properties of these LaMnO3 materials were characterized by XRD, N-2 sorption, H-2-TPR and O-2-TPD. Their catalytic performances were evaluated for the oxidation of toluene. It was shown that well-formed perovskite structures were obtained over samples LMO-SG and LMO-GC. Traces of La2O3 phase were detected over sample LMO-CP. The ranking in terms of specific surface area, low-temperature reducibility and concentration of surface adsorbed oxygen species from the highest to the lowest value was LMO-SG > LMO-CP > LMO-GC, which was in good agreement with the catalytic activity order. Sample LMO-SG exhibited the optimum catalytic activity and durability without any deactivation observed during the steady state of 60 h. Its superior catalytic performance could be greatly attributed to its higher specific surface area, better lowtemperature reducibility and more available surface adsorbed oxygen species. The apparent activation energies of samples LMO-SG, LMO-GC and LMO-CP were 71, 84 and 76 kJ mol(-1), respectively. The lowest apparent activation energy of sample LMO-SG was in good agreement with its better catalytic behavior for toluene oxidation. (c) 2013 Elsevier B.V. All rights reserved.