A5017117968- Hydrogen Storage and Materials
- Ammonia Synthesis and Nitrogen Reduction
- Hybrid Renewable Energy Systems
- Superconductivity in MgB2 and Alloys
- Inorganic Chemistry and Materials
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Inorganic Fluorides and Related Compounds
- Fermentation and Sensory Analysis
- Nuclear Materials and Properties
- Muon and positron interactions and applications
- Global Cancer Incidence and Screening
- Magnesium Alloys: Properties and Applications
- Carbon dioxide utilization in catalysis
- Phytochemicals and Antioxidant Activities
- Adsorption, diffusion, and thermodynamic properties of materials
- Advancements in Solid Oxide Fuel Cells
- Meat and Animal Product Quality
- Advanced ceramic materials synthesis
- Layered Double Hydroxides Synthesis and Applications
- Aerogels and thermal insulation
- CO2 Sequestration and Geologic Interactions
- Electronic and Structural Properties of Oxides
- Boron Compounds in Chemistry
- Sensory Analysis and Statistical Methods
Consorzio Futuro in Ricerca
2022
University of Sassari
2022
Helmholtz-Zentrum Hereon
2014-2020
Philips (United Kingdom)
2016-2019
Institute of Materials Research of the Slovak Academy of Sciences
2016-2018
Max Planck Society
2018
University of Turin
2016
Hydrogen storage in the solid state represents one of most attractive and challenging ways to supply hydrogen a proton exchange membrane (PEM) fuel cell. Although last 15 years large variety material systems have been identified as possible candidates for storing hydrogen, further efforts be made development which meet strict targets Fuel Cells Joint Undertaking (FCH JU) U.S. Department Energy (DOE). Recent projections indicate that system possessing: (i) an ideal enthalpy range 20–50 kJ/mol...
Abstract The system Mg(NH 2 ) + 2LiH is considered as an interesting solid-state hydrogen storage material owing to its low thermodynamic stability of ca. 40 kJ/mol H and high gravimetric capacity 5.6 wt.%. However, kinetic barriers lead slow absorption/desorption rates even at relatively temperatures (>180 °C). In this work, we investigate the effects addition K-modified Li x Ti y O z on behaviour system. comparison with pristine 2LiH, containing a tiny amount nanostructured shows...
Abstract A new complex ternary amide, Rb 2 [Mn(NH ) 4 ], which simultaneously contains both transition and alkali metal catalytic sites, is developed. This in line with the recently reported TM‐LiH composite catalysts, have been shown to effectively break scaling relations achieve ammonia synthesis under mild conditions. ] can be facilely synthesized by mechanochemical reaction at room temperature. It exhibits two temperature‐dependent polymorphs, that is, a low‐temperature orthorhombic...
To enhance the dehydrogenation/rehydrogenation kinetic behavior of LiBH4–MgH2 composite system, TiF4 is used as an additive. The effect this additive on hydride system has been studied by means laboratory and advanced synchrotron techniques. Investigations synthesis mechanism upon hydrogen interaction show that addition to during milling procedure leads in situ formation well-distributed nanosized TiB2 particles. These nanoparticles act nucleation agents for MgB2 dehydrogenation process...
Solid-state hydride compounds are a promising option for efficient and safe hydrogen-storage systems. Lithium reactive composite system 2LiBH4 + MgH2/2LiH MgB2 (Li-RHC) has been widely investigated owing to its high theoretical capacity low calculated reaction enthalpy (11.5 wt % H2 45.9 kJ/mol H2). In this paper, thorough investigation into the effect of formation nano-TiAl alloys on properties Li-RHC is presented. The additive 3TiCl3·AlCl3 used as nanoparticle precursor. For temperatures...
Aiming to improve the hydrogen storage properties of 2LiH + MgB<sub>2</sub>(Li-RHC), effect the<italic>in situ</italic>formed and low cost Li<sub>x</sub>TiO<sub>2</sub>is investigated.
Nanosized lithiated titanium oxide (LixTiO2) noticeably improves the kinetic behaviour of 2LiBH4 + MgH2. The presence LixTiO2 reduces time required for first dehydrogenation by suppressing intermediate reaction to Li2B12H12, leading direct MgB2 formation.
NbF<sub>5</sub> reduces dehydrogenation temperature of Ca(BH<sub>4</sub>)<sub>2</sub> + MgH<sub>2</sub> system by 100 °C. Here, we give a possible elucidation this effect.
We report on the first in situ synchrotron radiation powder X-ray diffraction study (SR-PXD) of ammonolysis reaction selected alkaline and earth metal hydrides (i.e., LiH, NaH, KH, MgH2, CaH2). The investigation was performed using an SR-PXD pressure cell at initial NH3 6.5 bar a range temperature between room (RT) 350 °C. results this work give new important insights into formation amides imides starting from corresponding hydrides. LiH observed to react with form LiNH2 already RT, then it...
Ternary transition metal amides were first synthesized by mechanochemical reaction without applying high temperatures, pressures or long times.
Sr(OH)<sub>2</sub> influences both the thermodynamics and kinetics of Mg(NH<sub>2</sub>)<sub>2</sub>–2LiH system, lowering dehydrogenation onset peak temperatures by <italic>ca.</italic> 70 °C 13 °C.
We report for the first time formation of a metal amide-hydride solid solution. The dissolution KH into KNH2 leads to an anionic substitution, which decreases interaction among NH2- ions. rotational properties high temperature polymorphs are thereby retained down room temperature.
CO2 capture and conversion are a key research field for the transition towards an economy only based on renewable energy sources. In this regard, hydride materials potential option methanation since they can provide hydrogen act as catalytic species. work, Mg2NiH4 complex is synthesized by in situ monitoring of mechanical milling under atmosphere from 2MgH2:Ni stoichiometric mixture. Temperature pressure evolution monitored, material characterized, during situ, thus providing good insight...
The crystal structure of a mixed amide-imide phase, RbMgND2ND, has been solved in the orthorhombic space group Pnma ( = 9.55256(31), b 3.70772(11) and c 10.08308(32) Å). A new metal amide-hydride solid solution, Rb(NH2) xH(1- x), isolated characterized entire compositional range. profound analogies, as well subtle differences, with chemistry KMgND2ND K(NH2) xH1- x are thoroughly discussed. This approach suggests that comparable performances obtained using K- Rb-based additives for Mg(NH2)2-...
The alkali metal amidozincates Li4 [Zn(NH2)4](NH2)2 and K2[Zn(NH2)4] were, to the best of our knowledge, studied for first time as hydrogen storage media. Compared with LiNH2-2 LiH system, both [Zn(NH2)4](NH2)2-12 K2[Zn(NH2)4]-8 systems showed improved rehydrogenation performance, especially LiH, which can be fully hydrogenated within 30 s at approximately 230 °C. absorption properties are stable upon cycling. This work shows that ternary amides containing transition metals have great...
New insights into the reaction pathways of different potassium/magnesium amide-hydride based systems are discussed. In situ SR-PXD experiments were for first time performed in order to reveal evolution phases connected with hydrogen releasing processes. Evidence a new K-N-H intermediate is shown and discussed particular focus on structural modification. Based these results, mechanism anionic exchange proposed.
This work presents the structural and thermal properties of ammine metal dodecahydro-<italic>closo</italic>-dodecaboranes their reversible ammonia (or hydrogen) storage.
The synergetic effects of Li<sub>3</sub>N and YCl<sub>3</sub> enable the 6Mg(NH<sub>2</sub>)<sub>2</sub>–9LiH–LiBH<sub>4</sub> system to fully re-hydrogenate within 8 min.
In this work, the hydrogen absorption and desorption properties of system K2[Zn(NH2)4]-8LiH are investigated in detail via situ synchrotron radiation powder X-ray diffraction (SR-PXD), Fourier transform infrared spectroscopy (FT-IR), volumetric methods. Upon milling, K2[Zn(NH2)4] 8LiH react to form 4LiNH2-4LiH-K2ZnH4, then 4LiNH2-4LiH-K2ZnH4 releases H2 multiple steps. The final products reaction KH, LiZn13, Li2NH. During rehydrogenation, KH reacts with LiZn13 under 50 bar producing K3ZnH5....
The formation of MgNi<sub>2.5</sub>B<sub>2</sub> upon dehydrogenation allows a reversible transfer the boron atoms between starting reactants and products.