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| Description
| - A solid solution of magnesium and manganese borohydrides was studied by in situ synchrotron radiation X-ray powder diffraction and infrared spectroscopy. A combination of thermogravimetry, mass and infrared spectroscopy, and atomic emission spectroscopy were applied to clarify the thermal gas desorption of pure Mn(BH(4))(2) and a solid solution of composition Mg(0.5)Mn(0.5)(BH(4))(2). Mg(x)Mn((1-x))(BH(4))(2) (x = 0-0.8) conserves the trigonal structure of Mn(BH(4))(2) at room temperature. Manganese is dissolved in the hexagonal structure of alpha-Mg(BH(4))(2), with the upper solubility limit not exceeding 10 mol.% at room temperature. There exists a two-phase region of trigonal and hexagonal borohydrides within the compositional range x = 0.8-0.9 at room temperature. Infrared spectra show splitting of various vibrational modes, indicating the presence of two cations in the trigonal Mg(x)Mn((1-x))(BH(4))(2) solid solutions, as well as the appearance of a second phase, hexagonal alpha-Mg(BH(4))(2), at higher magnesium contents. All vibrational frequencies are shifted to higher values with increasing magnesium content. The decomposition temperature of the trigonal Mg(x)Mn((1-x))(BH(4))(2) (x = 0-0.8) does not vary significantly as a function of the magnesium content (433-453 K). The desorbed gas contains mostly hydrogen and 3-7.5 mol.% diborane B(2)H(6), as determined from analyses of the Mn(BH(4))(2) and Mg(0.5)Mn(0.5)(BH(4))(2) samples. An eutectic relation between alpha-Mg(BH(4))(2) and LiBH(4) is observed. The solid solution Mg(x)Mn((1-x))(BH(4))(2) is a promising material for hydrogen storage as it decomposes at a similar temperature to Mn(BH(4))(2), i.e. at a much lower temperature than pure Mg(BH(4))(2) without significantly losing hydrogen weight capacity thanks to substitution of Mn by Mg up to 80 mol.%. The questions of diborane release and reversibility remain to be addressed.
- A solid solution of magnesium and manganese borohydrides was studied by in situ synchrotron radiation X-ray powder diffraction and infrared spectroscopy. A combination of thermogravimetry, mass and infrared spectroscopy, and atomic emission spectroscopy were applied to clarify the thermal gas desorption of pure Mn(BH(4))(2) and a solid solution of composition Mg(0.5)Mn(0.5)(BH(4))(2). Mg(x)Mn((1-x))(BH(4))(2) (x = 0-0.8) conserves the trigonal structure of Mn(BH(4))(2) at room temperature. Manganese is dissolved in the hexagonal structure of alpha-Mg(BH(4))(2), with the upper solubility limit not exceeding 10 mol.% at room temperature. There exists a two-phase region of trigonal and hexagonal borohydrides within the compositional range x = 0.8-0.9 at room temperature. Infrared spectra show splitting of various vibrational modes, indicating the presence of two cations in the trigonal Mg(x)Mn((1-x))(BH(4))(2) solid solutions, as well as the appearance of a second phase, hexagonal alpha-Mg(BH(4))(2), at higher magnesium contents. All vibrational frequencies are shifted to higher values with increasing magnesium content. The decomposition temperature of the trigonal Mg(x)Mn((1-x))(BH(4))(2) (x = 0-0.8) does not vary significantly as a function of the magnesium content (433-453 K). The desorbed gas contains mostly hydrogen and 3-7.5 mol.% diborane B(2)H(6), as determined from analyses of the Mn(BH(4))(2) and Mg(0.5)Mn(0.5)(BH(4))(2) samples. An eutectic relation between alpha-Mg(BH(4))(2) and LiBH(4) is observed. The solid solution Mg(x)Mn((1-x))(BH(4))(2) is a promising material for hydrogen storage as it decomposes at a similar temperature to Mn(BH(4))(2), i.e. at a much lower temperature than pure Mg(BH(4))(2) without significantly losing hydrogen weight capacity thanks to substitution of Mn by Mg up to 80 mol.%. The questions of diborane release and reversibility remain to be addressed. (en)
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| Title
| - Mg(x)Mn(1-x)(BH4)2 (x=0-0.8), a cation solid solution in a bimetallic borohydride
- Mg(x)Mn(1-x)(BH4)2 (x=0-0.8), a cation solid solution in a bimetallic borohydride (en)
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| skos:prefLabel
| - Mg(x)Mn(1-x)(BH4)2 (x=0-0.8), a cation solid solution in a bimetallic borohydride
- Mg(x)Mn(1-x)(BH4)2 (x=0-0.8), a cation solid solution in a bimetallic borohydride (en)
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| skos:notation
| - RIV/00216208:11310/11:10104772!RIV12-MSM-11310___
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| http://linked.open...avai/predkladatel
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| http://linked.open...avai/riv/aktivita
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| http://linked.open...avai/riv/aktivity
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| http://linked.open...iv/cisloPeriodika
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| http://linked.open...vai/riv/dodaniDat
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| http://linked.open...aciTvurceVysledku
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| http://linked.open.../riv/druhVysledku
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| http://linked.open...iv/duvernostUdaju
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| http://linked.open...titaPredkladatele
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| http://linked.open...dnocenehoVysledku
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| http://linked.open...ai/riv/idVysledku
| - RIV/00216208:11310/11:10104772
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| http://linked.open...riv/jazykVysledku
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| http://linked.open.../riv/klicovaSlova
| - 1st-principles; Mg(BH4)2; complex hydrides; lithium borohydride; magnesium borohydride; crystal-structure; metal borohydrides; thermal-decomposition; hydrogen storage; X-ray-diffraction (en)
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| http://linked.open.../riv/klicoveSlovo
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| http://linked.open...odStatuVydavatele
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| http://linked.open...ontrolniKodProRIV
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| http://linked.open...i/riv/nazevZdroje
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| http://linked.open...in/vavai/riv/obor
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| http://linked.open...ichTvurcuVysledku
| |
| http://linked.open...cetTvurcuVysledku
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| http://linked.open...UplatneniVysledku
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| http://linked.open...v/svazekPeriodika
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| http://linked.open...iv/tvurceVysledku
| - Růžička, Jakub
- D'Anna, Vincenza
- Durand, Etienne
- Hagemann, Hans
- Penin, Nicolas
- Černý, Radovan
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| http://linked.open...ain/vavai/riv/wos
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| issn
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| number of pages
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| http://bibframe.org/vocab/doi
| - 10.1016/j.actamat.2011.04.052
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| http://localhost/t...ganizacniJednotka
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| is http://linked.open...avai/riv/vysledek
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