Catalytic effect of niobium oxide on hydrogen storage properties of mechanically ball milled MgH2
作者： Nobuko Hanada , Takayuki Ichikawa , Hironobu Fujii
DOI: 10.1016/J.PHYSB.2006.03.051
关键词: Niobium oxide 、 Magnesium hydride 、 Analytical chemistry 、 Catalysis 、 Materials science 、 Hydrogen 、 Ball mill 、 Hydrogen storage 、 XANES 、 Dehydrogenation
摘要: We examined a catalytic effect of niobium oxide (Nb 2 O 5 ) on the hydrogen storage properties MgH prepared by mechanical ball milling method. The composite doped with 1 mol% Nb for 20 h desorbed up to ∼6 mass% in temperature range from 200 250 °C at heating rate °C/min under purified helium flow. After dehydrogenation °C, product showed remarkable absorption kinetics. A large amount gaseous ∼4.5 was absorbed even room MPa pressure within 15 s and finally its capacity reached mass%. Furthermore, valence state X-ray near edge structure (XANES) measurement. results indicated that additive reduced during milling. This suggests compound, which atom is less than 5+, acts as catalyst absorbing/desorbing
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Gagik Barkhordarian, Thomas Klassen, Rüdiger Bormann, Fast hydrogen sorption kinetics of nanocrystalline Mg using Nb2O5 as catalyst Scripta Materialia. ,vol. 49, pp. 213- 217 ,(2003) , 10.1016/S1359-6462(03)00259-8
Nobuko Hanada, Takayuki Ichikawa, Hironobu Fujii, Catalytic effect of nanoparticle 3d-transition metals on hydrogen storage properties in magnesium hydride MgH2 prepared by mechanical milling. Journal of Physical Chemistry B. ,vol. 109, pp. 7188- 7194 ,(2005) , 10.1021/JP044576C
Gagik Barkhordarian, Thomas Klassen, Rüdiger Bormann, Effect of Nb2O5 content on hydrogen reaction kinetics of Mg Journal of Alloys and Compounds. ,vol. 364, pp. 242- 246 ,(2004) , 10.1016/S0925-8388(03)00530-9
Takayuki Ichikawa, Nobuko Hanada, Shigehito Isobe, Haiyan Leng, Hironobu Fujii, Composite Materials based on Light Elements for Hydrogen Storage Materials Transactions. ,vol. 46, pp. 1- 14 ,(2005) , 10.2320/MATERTRANS.46.1
N. Hanada, T. Ichikawa, H. Fujii, Catalytic effect of Ni nano-particle and Nb oxide on H-desorption properties in MgH2 prepared by ball milling Journal of Alloys and Compounds. ,vol. 404, pp. 716- 719 ,(2005) , 10.1016/J.JALLCOM.2004.12.166