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The aim of this work is to investigate the influence of some processes variables on the microstructure and hydrogen absorption kinetics of MgH2 - X wt.% TiFe composites. Samples were synthesized by high-energy ball milling in a planetary (X 405060) and shaker mill (X 40) under high-purity argon atmosphere. Commercial MgH2 instead of Mg powder was used in order to reduce adherence on
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Jun 232006 There may not be a pot of gold at the end of the rainbowbut there appears to be nanocrystalline diamonds at the end of a process to produce and store hydrogen using anthracite coal. The idea we explored was based on ball milling graphite processes found in the hydrogen storage literature said Angela D. Luekingassistant professor of energy and geoenvironmental engineering.
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Ball milling Hydrogen storage TiFe Hydrides Activation abstract In this studywe propose a method to produce nanocrystalline TiFe powder by high-energy ball millingin order to avoid the common sticking problem of the material to the milling toolsassuring a material prompt to absorb hydrogen as well. The method consists of
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We demonstrate improved hydrogen storage properties of a nanoscale MgB material made by surfactant ball milling MgB 2 in a mixture of heptaneoleic acidand oleylamine. Transmission electron microscopy data show that MgB nanoplatelets are produced with sizes ranging from 5 to 50 nmwhich agglomerate upon ethanol washing to produce an
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The experimental results prove that the addition of palladium and proper ball milling can effectively improve the electrochemical hydrogen storage capacity of the Co 2 B alloy. The Co SUB 2 SUB B alloy is synthesized by high temperature solid phase process. 5 wt% Pd is added to the Co SUB 2 SUB B alloy by ball milling at different milling
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Maximum hydrogen storage capacities of the MmNi 5 alloy have been obtained as 1.681.641.56 and 1.52 wt% on ball-milling with CoNiMn and Ferespectivelyat the concentration of 2.0 wt%. Table 3 shows hydrogen storage capacity of ball-milled MmNi 5 with different concentration (x) of transition metal. Very small amount of added
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However it alsoreduced the hydrogen storage capacity. The observed increased kinetics was likely causedby the reduction of crystallite sizes with longer ball milling times.
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Request PDF Effect of ball milling on hydrogen storage of Mg 3La alloy Hydrogen storage and microstructure of ball milled Mg3La alloy were investigated by X-ray diffraction and pressure
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T1 - Effect of ball-milling duration and dehydrogenation on the morphologymicrostructure and catalyst dispersion in Ni-catalyzed MgH2 hydrogen storage materials. AU - HouseStephen D. AU - VajoJohn J. AU - RenChai. AU - RockettAngus A. AU - RobertsonIan M. PY - 20153. Y1 - 20153
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Desorption temperature and kinetics Nano-nickel additives Hydrogen storage materials Composite hydrides MgH 2 and FeTi Ball milling a b s t r a c t Hydride-intermetallic composites MgH 2 X wt
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It is concluded that ball milling can significantly improve the kinetic and electrochemical properties of magnesium-based hydrogen storage materials and increase the hydrogen storage capacity.
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Local structure of the nanostructured LaNi5 hydrogen storage alloysprepared by ball-millinghas been studied using Ni K-edge extended X-ray absorption fine structure spectroscopy.
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Sep 222011 Special Issue on Novel Hydrogen Storage Systems and Materials. Hydrogen storage properties of ball-milled graphite with 0.5 wt% Fe. Yinghe Zhang and; David Book ; Article first published online: 22 SEP 2011
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Mass pure sandwich-like (hcp- and fcc-) CoGE (graphene)Co nanocomposites have been synthesized by direct ball-milling of Co and GE powders by adjusting the reaction conditionsand the maximum hydrogen storage capacity achieved was 899.5 mA h g1 (3.29 wt% hydrogen).
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calorimetry. The hydrogen desorption of Ca(BH4)2 depends strongly on the amount of coexistent ab and g polymorphs as well as additional ball milling and added TiF3 to the sample. The addition of TiF3 increased the hydrogen desorption rate without signicant dissociation of the uoride.
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Improved hydrogen storage properties of MgH 2 by ball milling with AlH 3: preparationsderehydriding propertiesand reaction mechanisms Haizhen Liu a Xinhua Wang , a Yongan Liu a Zhaohui Dong b Guozhou Cao a Shouquan Li a and Mi Yan c
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