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Hydrogen storage properties of MgH 2 ‐diatomite composites obtained by high‐energy ball milling S. MILOVANOVIĆ Department of Material Science, Vinča Institute of Nuclear Sciences, P.O. Box 522, 11001 Belgrade, Serbia
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The ternary amides LiK2(NH2)3, LiK(NH2)2, and Li3K(NH2)4 are successfully synthesized by ball milling mixtures of LiNH2 and KNH2, and the hydrogen storage properties of Li3K(NH2)4–xMgH2 (x = 1 ...
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The hydrogen storage performance of the MgH 2 /SWNT composite prepared under an optimal condition, i.e. 5 wt.% SWNTs and milling for 10 h, was further investigated. As shown in Fig. 6, the composite could desorb about 6.1 wt.% hydrogen within 5 min at 623 K, and pure MgH 2 could only desorb 4.1 wt.% hydrogen within 60 min at the same conditions.
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In this paper, we report the microstructure and hydrogen storage properties of TiFe + 4 wt% (Zr + 2Mn) alloy before and after high-energy milling. The as-cast sample was made of a main TiFe phase with a Zr- and Mn-rich secondary phase. We found that ball milling can significantly reduce the crystallite size of TiFe + 4 wt% (Zr + 2Mn) alloy. First hydrogenation measurements showed that the ...
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Ball-milling method can simplify and achieve macroscopic preparation as well as reduce the whole cost, especially suitable for the preparation of hydrogen storage materials, . By careful analysis of SEM and HRTEM images, it is concluded that Ti nanoparticles wrapped in GE matrix composites are formed in the ball-milling system.
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Characteristics of electrochemical hydrogen storage using Ti–Fe based alloys prepared by ball milling Int. J. Hydrogen Energy (IF 5.816) Pub Date : Hongwei Shang, Yanghuan Zhang, Jinliang Gao, Wei Zhang, Xin Wei, Zeming Yuan, Yaqin Li ...
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PCT curves and hydrogen storage energetics. PCT curves of the milled alloys at 613 K are illustrated in Fig. 3.It displays that the pressure of absorption and desorption plateaus visibly rises with the increase in milling time, which is ascribed to the internal strain stored during the ball milling [].Furthermore, the pressure plateaus of absorption/desorption exhibit an obvious tilt and a ...
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The catalytic effects of CoFe 2 O 4 nanoparticles on the hydrogen storage properties of LiAlH 4 prepared by ball milling were investigated. The onset desorption temperature of the LiAlH 4 + 2 mol% CoFe 2 O 4 sample is 65 °C, which is 90 °C lower that of the as …
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Ball milling at different milling time can influence the electrochemical hydrogen storage performance of the Co2B alloy. Abstract The Co 2 B alloy is synthesized by high temperature solid phase process. 5 wt% Pd is added to the Co 2 B alloy by ball milling at different milling time in order to enhance discharge performance of the raw alloy.
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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 þ X wt ...
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Hydrogen-storage properties of Mg–Ag samples after ball milling and subsequent annealing. Fig. 8 shows the hydrogenation kinetics curves obtained for samples after mechanical alloying followed by annealing. It is easy to notice that most of the samples absorb significant amounts of hydrogen under the chosen conditions (except AgMg).
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Hydrogen-Storage Materials from Reactive Ball-Milling Ming-lin Zhang, Min-jian Yang, Tong-huan Zhang, Guang-wei Zhang, Hai-peng Chen Coal Chemical Company, Shongdong Yankuang Group, Zoucheng 273500, China Email: honglinymj@163 Abstract:
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Ball milling has been used to modify the morphologies of cup-stacked carbon nanotubes [12], generate different carbon nanoparticles from graphitic carbon for hydrogen storage [13], transform ...
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Li–Mg–N–B–H/ZrCoH 3 composites were successfully synthesized by ball milling of the reactants under argon and hydrogen atmosphere, respectively. The composite synthesized by reactive ball milling (RBM) under hydrogen has the best hydrogen storage properties. It can desorb 3.71 wt% hydrogen in 60 min at 150 °C under pressure of 0.1 MPa, and the dehydrogenation capacity reaches …
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The prominent hydrogen storage performances are related to the reactions between MgH 2 and Fe 7 S 8. The newly formed MgS and Fe in the ball-milling process present a co-catalytic effect on the hydrogen storage performance of MgH 2.
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-Effect of milling duration on hydrogen storage thermodynamics and kinetics of ball-milled Ce-Mg-Ni-based alloy powders.pdf,,,,,,,,,,,J. Iron Steel Res. Int. (2018) 25:746–754 /10 ...
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The lightweight compound material NaNH2–NaBH4 is regarded as a promising hydrogen storage composite due to the high hydrogen density. Mechanical ball milling was employed to synthesize the composite NaNH2–NaBH4 (2/1 molar ratio), and the samples were investigated utilizing thermogravimetric-differential thermal analysis-mass spectroscopy (TG-DTA-MS), X-ray diffraction …
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Time-resolved studies uncovered kinetics and mechanism of Mg–hydrogen interactions during High energy reactive ball milling in hydrogen (HRBM) in presence of various types of carbon, including graphite (G), activated carbon (AC), multi-wall carbon nanotubes (MWCNT), expandable (EG) and thermally-expanded (TEG) graphite.
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It has been reported in the literature that ball milling increases the surface area, volume fraction of grain boundaries, and induces defects that promote hydrogen absorption and desorption characteristics. 26-29 In some of the studies, the researcher found that the addition of Mg 2 Ni to Mg during milling improves the absorption and desorption ...
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Mn-based borohydride synthesized by ball-milling KBH4 and MnCl2 for hydrogen storage. February 2014; International Journal of Hydrogen Energy 39(5) ... for hydrogen storage. Ruixia Liu.
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But, instead of being loaded into the ball mill, it was Figure 1 shows the results obtained by TGA just after placed on a hot plate and heated to 40 °C and held at that completing two of the key steps of this direct synthesis Synthesis of Metal Complex Hydrides for Hydrogen Storage J. Phys. Chem. C, Vol. 111, No. 40, 2007 14919 Figure 1.
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Melt spinning (MS) and ball milling (BM) were employed to fabricate YMg11Ni alloy, and their structures and hydrogen storage performances were …
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Mg-Ni alloys for hydrogen storage obtained by ball milling October 2002 Latin American applied research Pesquisa aplicada latino americana = Investigación aplicada latinoamericana 32(4):289-294
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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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3.4 Hydrogen Storage Thermodynamics and P-C-T Curves In order to inspect the influence of melt spinning and ball milling for the hydrogen absorption/desorption thermodynamics of YMg 11 Ni alloy, P-C-T curves of the alloys, respectively, recorded the information at different four temperatures of 593, 613, 633, and 653 K, as presented in Fig. 8.
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In order to enhance the hydrogen storage properties of LiBH4, activated charcoal (AC) was used as the scaffold to confine LiBH4 in this paper. Ball milling was used to prepare LiBH4/AC composites. Experimental results show that dehydrogenation properties of ball-milled LiBH4/AC (LiBH4/AC-BM) are greatly improved compared with that of pristine LiBH4, ball-milled LiBH4 (LiBH4 …
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Effects of Ni Content and Ball Milling Time on the Hydrogen Storage Thermodynamics and Kinetics Performances of La-Mg-Ni Ternary Alloys Zhen-Yang Li 1, 3, Sheng-Li Li 1 (), Ze-Ming Yuan 2, 3, Yang-Huan Zhang 2, 3 ()
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Keywords: hydrogen storage, ball milling, tetrahydrofuran, boron nitride, lithium amide, lithium hydride; s ä Hydrogen is a promising clean energy source. Hydrogen storage today remains one of the most significant issues hindering the development of a 'hydrogen energy economy' [1]. The Li …
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2Ni, nanocrystalline, mechanical alloying, ball-milling, hydrogen storage 1. Introduction Many metallic materials are known to form hydrides reversibly. Intermetallic Mg 2Ni with its high hydrogen capacity (up to 3.6 wt.%) is the prime candidates among hydrogen storage systems [1–5]. However, Mg …
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Melt spinning (MS) and ball milling (BM) were employed to fabricate YMg11Ni alloy, and their structures and hydrogen storage performances were examined. The results reveal that the as-spun and as-milled alloys both exhibit the …
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