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A novel mesoporous oxidation catalyst La-Co-Zr-O prepared by using nonionic and cationic surfactants as co-templates
Zou, ZQ; Meng, M; Luo, JY; Zha, YQ; Xie, YN; Hu, TD; Liu, T; Xie YN(谢亚宁); Hu TD(胡天斗); Liu T(刘涛)
2006
发表期刊JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL
卷号249期号:1-2页码:#REF!
通讯作者Meng, M (reprint author), Tianjin Univ, Sch Chem Engn & Technol, Dept Catalysis Sci & Technol, Tianjin 300072, Peoples R China.
摘要The mesoporous La-Co-Zr-O catalyst with the atomic ratio of La + Co/La + Co + Zr = 0.5 was prepared by citric acid complexation-organic template decomposition method, using the mixture of nonionic-p-octyl polyethylene glycol phenyl ether (OP) and cationic cetyltrimethyl-ammonium bromide (CTAB) as co-templates (LCZ-OP/CTAB-0.5). The results of BET and pore size distribution show that this sample possesses much bigger specific surface area (117.6m(2)/g) than those prepared by using single template CTAB (96.6m(2)/g, LCZ-CTAB) or by using conventional co-precipitation method (21.6 m(2)/g, LCZ-CO). Both the samples obtained from single template CTAB and from the co-templates of OP and CTAB show very uniform mesoporous pore diameter (3.5-4.3 nm). The structural characterization results of XRD, XPS and Co K-edge EXAFS indicate that the highly dispersed Co3O4 crystallite should be the main active phase for CO oxidation. The crystal sizes Of Co3O4 crystallites in LCZ-CTAB and LCZ-OP/CTAB-0.5 are 23.4 and 32.5 nm, respectively, which are much smaller than that in LCZ-CO (56.8 nm). The catalytic activity evaluation shows that the sample prepared by co-templates decomposition possesses much better activity for CO oxidation, especially the low temperature oxidation activity. However, the activity sequence of the samples is not the same as the crystal size of Co3O4 phase. On the contrary, the reducibility of bond Co-O and the reduced amount Of Co3O4 phase below 500 degrees C for the samples are well correlated with their activity law, which should be a crucial factor for the oxidation performance of the samples. (c) 2006 Elsevier B.V. All rights reserved.
文章类型Article
关键词mesoporous La-Co-Zr-O catalyst cetyltrimethyl-ammonium bromide (CTAB) p-Octyl polyethylene glycol phenyl ether (OP) structural characterization CO oxidation
学科领域Chemistry
DOI10.1016/j.molcata.2006.01.010
收录类别SCI
WOS类目Chemistry, Physical
WOS记录号WOS:000237173500034
引用统计
被引频次:17[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/227141
专题多学科研究中心
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Zou, ZQ,Meng, M,Luo, JY,et al. A novel mesoporous oxidation catalyst La-Co-Zr-O prepared by using nonionic and cationic surfactants as co-templates[J]. JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL,2006,249(1-2):#REF!.
APA Zou, ZQ.,Meng, M.,Luo, JY.,Zha, YQ.,Xie, YN.,...&刘涛.(2006).A novel mesoporous oxidation catalyst La-Co-Zr-O prepared by using nonionic and cationic surfactants as co-templates.JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL,249(1-2),#REF!.
MLA Zou, ZQ,et al."A novel mesoporous oxidation catalyst La-Co-Zr-O prepared by using nonionic and cationic surfactants as co-templates".JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL 249.1-2(2006):#REF!.
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