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题名: Characterizations and activities of the nano-sized Ni/Al2O3 and Ni/La-Al2O3 catalysts for NH3 decomposition
作者: Zhang, J;  Xu, HY;  Jin, XL;  Ge, QJ;  Li, WZ
通讯作者: 徐恒泳
关键词: ammonia decomposition ;  nano-sized nickel catalyst ;  lanthanum promotion ;  reduction kinetics ;  hydrogen production
刊名: APPLIED CATALYSIS A-GENERAL
发表日期: 2005-08-18
DOI: 10.1016/j.apcata.2005.05.020
卷: 290, 期:1-2, 页:87-96
收录类别: SCI
文章类型: Article
部门归属: 8
项目归属: 801
产权排名: 1;1
WOS标题词: Science & Technology ;  Physical Sciences ;  Life Sciences & Biomedicine
类目[WOS]: Chemistry, Physical ;  Environmental Sciences
研究领域[WOS]: Chemistry ;  Environmental Sciences & Ecology
英文摘要: A series of nano-sized Ni/Al2O3 and Ni/La-Al2O3 catalysts that possess high activities for NH3 decomposition have been successfully synthesized by a coprecipitation method. The catalytic performance was investigated under the atmospheric conditions and a significant enhancement in the activity after the introduction of La was observed. Aiming to study the influence of La promoter on the physicochemical properties, we characterized the catalysts by N-2 adsorption/desorption, XRD, H-2-TPR, chemisorption and TEM techniques. Physisorption results suggested a high specific surface area and XRD spectra showed that nickel particles are in a highly dispersed state. A combination of XRD, TEM and chemisorption showed that Ni-0 particles with the average size lower, than 5.0 nm are always obtained even though the Ni loading ranged widely from 4 to 63 %. Compared with the Ni/Al2O3 catalysts, the Ni/La-Al2O3 ones with an appropriate amount of promoter enjoy a more open mesoporous structure and higher dispersion of Ni. Reduction kinetic studies of prepared catalysts were investigated by temperature-programmed reduction (TPR) method and the fact that La additive partially destroyed the metastable Ni-Al mixed oxide phase was detailed. (c) 2005 Elsevier B.V. All rights reserved.
关键词[WOS]: COX-FREE HYDROGEN ;  FUEL-CELL APPLICATIONS ;  AMMONIA DECOMPOSITION ;  ALUMINA CATALYSTS ;  SUPPORTED NICKEL ;  SURFACE ;  CHEMISORPTION ;  TEMPERATURE ;  GENERATION ;  REDUCTION
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000231197500011
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/92363
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, Grad Sch, Dalian Inst Chem Phys, Nat Gas Utilizat Appl Catalysis Lab, Dalian 116023, Peoples R China
2.Daqing Petr Co, Inst Res, Dalian 116023, Peoples R China

Recommended Citation:
Zhang, J,Xu, HY,Jin, XL,et al. Characterizations and activities of the nano-sized Ni/Al2O3 and Ni/La-Al2O3 catalysts for NH3 decomposition[J]. APPLIED CATALYSIS A-GENERAL,2005,290(1-2):87-96.
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