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题名: Superior performance of Ir-substituted hexaaluminate catalysts for N2O decomposition
作者: Zhu, Shaomin1, 2;  Wang, Xiaodong1;  Wang, Aiqin1;  Zhang, Tao1
通讯作者: 张涛
关键词: N2O decomposition ;  iridium ;  hexaaluminate ;  propellant
刊名: CATALYSIS TODAY
发表日期: 2008-02-29
DOI: 10.1016/j.cattod.2007.10.093
卷: 131, 期:1-4, 页:339-346
收录类别: ISTP ;  SCI
文章类型: Article
部门归属: 15
项目归属: 1501
产权排名: 1;1
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Applied ;  Chemistry, Physical ;  Engineering, Chemical
研究领域[WOS]: Chemistry ;  Engineering
英文摘要: Novel Ir-substituted hexaaluminate catalysts were developed for the first time and used for catalytic decomposition of high concentration of N2O. The catalysts were prepared by one-pot precipitation and characterized by X-ray diffraction (XRD), N-2-adsorption, scanning electronic microscopy (SEM) and temperature-programmed reduction (H-2-TPR). The XRD results showed that only a limited amount of iridium was incorporated into the hexaaluminate lattice by substituting Al3+ to form BaIrxFe1-xAl11O19 after being calcined at 1200 degrees C, while the other part of iridium existed as IrO2 phase. The activity tests for high concentration (30%, v/v) of N2O decomposition demonstrated that the BaIrxFe1-xAl11O19 hexaaluminates exhibited much higher activities and stabilities than the Ir/Al2O3-1200, and the pre-reduction with H-2 was essential for activating the catalysts. By comparing BaIrxFe1-xAl11O19 with BaIrxAl12-xO19 (x = 0-0.8), it was found that iridium was the active component in the N2O decomposition and the framework iridium was more active than the large IrO2 particles. On the other hand, Fe facilitated the formation of hexaaluminate as well as the incorporation of iridium into the framework. (c) 2007 Elsevier B.V. All rights reserved.
关键词[WOS]: HYDROTALCITE-LIKE PRECURSORS ;  HIGH-TEMPERATURE COMBUSTION ;  NITROUS-OXIDE ;  PARTIAL OXIDATION ;  SUPPORTS ;  NI ;  METHANE ;  CO
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000253382100046
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/100143
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing, Peoples R China

Recommended Citation:
Zhu, Shaomin,Wang, Xiaodong,Wang, Aiqin,et al. Superior performance of Ir-substituted hexaaluminate catalysts for N2O decomposition[J]. CATALYSIS TODAY,2008,131(1-4):339-346.
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