| People | Locations | Statistics |
|---|---|---|
| Naji, M. |
| |
| Motta, Antonella |
| |
| Aletan, Dirar |
| |
| Mohamed, Tarek |
| |
| Ertürk, Emre |
| |
| Taccardi, Nicola |
| |
| Kononenko, Denys |
| |
| Petrov, R. H. | Madrid |
|
| Alshaaer, Mazen | Brussels |
|
| Bih, L. |
| |
| Casati, R. |
| |
| Muller, Hermance |
| |
| Kočí, Jan | Prague |
|
| Šuljagić, Marija |
| |
| Kalteremidou, Kalliopi-Artemi | Brussels |
|
| Azam, Siraj |
| |
| Ospanova, Alyiya |
| |
| Blanpain, Bart |
| |
| Ali, M. A. |
| |
| Popa, V. |
| |
| Rančić, M. |
| |
| Ollier, Nadège |
| |
| Azevedo, Nuno Monteiro |
| |
| Landes, Michael |
| |
| Rignanese, Gian-Marco |
|
Durand, Etienne
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (6/6 displayed)
- 2022Topotactic fluorination of intermetallics as an efficient route towards quantum materialscitations
- 2020Access to Heteroleptic Fluorido‐Cyanido Complexes with a Large Magnetic Anisotropy by Fluoride Abstractioncitations
- 2016Tuning the Mn and Fe valence states into new Ca0.7Mn2-xFexO4 (0 < x £ 0.60) solid solution during reversible redox processescitations
- 2014Comparison of the surface modifications of polymers induced by direct fluorination and rf-plasma using fluorinated gasescitations
- 2011Mg<i><sub>x</sub></i>Mn<sub>(1−</sub><i><sub>x</sub></i><sub>)</sub>(BH<sub>4</sub>)<sub>2</sub> (<i>x </i>= 0-0.8), a cation solid solution in a bimetallic borohydridecitations
- 2007Interfacial and surface characterization of fluorine treated SnAgCu and NiTi powders and NiTi/SnAgCu composite materials
Places of action
| Organizations | Location | People |
|---|
article
Mg<i><sub>x</sub></i>Mn<sub>(1−</sub><i><sub>x</sub></i><sub>)</sub>(BH<sub>4</sub>)<sub>2</sub> (<i>x </i>= 0-0.8), a cation solid solution in a bimetallic borohydride
Abstract
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<sub>4</sub>)<sub>2</sub> and a solid solution of composition Mg<sub>0.5</sub>Mn<sub>0.5</sub>(BH<sub>4</sub>)<sub>2</sub>. Mg<i><sub>x</sub></i>Mn<sub>(1−</sub><i><sub>x</sub></i><sub>)</sub>(BH<sub>4</sub>)<sub>2</sub> (<i>x = </i>0-0.8) conserves the trigonal structure of Mn(BH<sub>4</sub>)<sub>2</sub> at room temperature. Manganese is dissolved in the hexagonal structure of α-Mg(BH<sub>4</sub>)<sub>2</sub>, 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 <i>x </i>= 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<i><sub>x</sub></i>Mn<sub>(1−</sub><i><sub>x</sub></i><sub>)</sub>(BH<sub>4</sub>)<sub>2</sub> solid solutions, as well as the appearance of a second phase, hexagonal α-Mg(BH<sub>4</sub>)<sub>2</sub>, at higher magnesium contents. All vibrational frequencies are shifted to higher values with increasing magnesium content. The decomposition temperature of the trigonal Mg<i><sub>x</sub></i>Mn<sub>(1−</sub><i><sub>x</sub></i><sub>)</sub>(BH<sub>4</sub>)<sub>2</sub> (<i>x = </i>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<sub>2</sub>H<sub>6</sub>, as determined from analyses of the Mn(BH<sub>4</sub>)<sub>2</sub> and Mg<sub>0.5</sub>Mn<sub>0.5</sub>(BH<sub>4</sub>)<sub>2</sub> samples. An eutectic relation between α-Mg(BH<sub>4</sub>)<sub>2</sub> and LiBH<sub>4</sub> is observed. The solid solution Mg<i><sub>x</sub></i>Mn<sub>(1−</sub><i><sub>x</sub></i><sub>)</sub>(BH<sub>4</sub>)<sub>2</sub> is a promising material for hydrogen storage as it decomposes at a similar temperature to Mn(BH<sub>4</sub>)<sub>2</sub>, i.e. at a much lower temperature than pure Mg(BH<sub>4</sub>)<sub>2</sub> 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.