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Superior performance of Ir-substituted hexaaluminate catalysts for N2O decomposition
Zhu, Shaomin1,2; Wang, Xiaodong1; Wang, Aiqin1; Zhang, Tao1; Zhang T(张涛); Zhang T(张涛)
关键词N2o Decomposition Iridium Hexaaluminate Propellant
刊名CATALYSIS TODAY
2008-02-29
DOI10.1016/j.cattod.2007.10.093
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
关键词[WOS]HYDROTALCITE-LIKE PRECURSORS ; HIGH-TEMPERATURE COMBUSTION ; NITROUS-OXIDE ; PARTIAL OXIDATION ; SUPPORTS ; NI ; METHANE ; CO
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.
语种英语
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WOS记录号WOS:000253382100046
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被引频次:33[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/100143
专题中国科学院大连化学物理研究所
通讯作者Zhang T(张涛); Zhang T(张涛)
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
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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.
APA Zhu, Shaomin,Wang, Xiaodong,Wang, Aiqin,Zhang, Tao,张涛,&张涛.(2008).Superior performance of Ir-substituted hexaaluminate catalysts for N2O decomposition.CATALYSIS TODAY,131(1-4),339-346.
MLA Zhu, Shaomin,et al."Superior performance of Ir-substituted hexaaluminate catalysts for N2O decomposition".CATALYSIS TODAY 131.1-4(2008):339-346.
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