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Characterizations and activities of the nano-sized Ni/Al2O3 and Ni/La-Al2O3 catalysts for NH3 decomposition
Zhang, J; Xu, HY; Jin, XL; Ge, QJ; Li, WZ; Xu HY(徐恒泳); Xu HY(徐恒泳)
关键词Ammonia Decomposition Nano-sized Nickel Catalyst Lanthanum Promotion Reduction Kinetics Hydrogen Production
刊名APPLIED CATALYSIS A-GENERAL
2005-08-18
DOI10.1016/j.apcata.2005.05.020
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
关键词[WOS]COX-FREE HYDROGEN ; FUEL-CELL APPLICATIONS ; AMMONIA DECOMPOSITION ; ALUMINA CATALYSTS ; SUPPORTED NICKEL ; SURFACE ; CHEMISORPTION ; TEMPERATURE ; GENERATION ; REDUCTION
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.
语种英语
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WOS记录号WOS:000231197500011
引用统计
被引频次:161[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/321008/92363
专题中国科学院大连化学物理研究所
通讯作者Xu HY(徐恒泳); Xu HY(徐恒泳)
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
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GB/T 7714
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.
APA Zhang, J.,Xu, HY.,Jin, XL.,Ge, QJ.,Li, WZ.,...&徐恒泳.(2005).Characterizations and activities of the nano-sized Ni/Al2O3 and Ni/La-Al2O3 catalysts for NH3 decomposition.APPLIED CATALYSIS A-GENERAL,290(1-2),87-96.
MLA Zhang, J,et al."Characterizations and activities of the nano-sized Ni/Al2O3 and Ni/La-Al2O3 catalysts for NH3 decomposition".APPLIED CATALYSIS A-GENERAL 290.1-2(2005):87-96.
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