A5030050794- Hydrogen Storage and Materials
- Ammonia Synthesis and Nitrogen Reduction
- X-ray Diffraction in Crystallography
- Crystallization and Solubility Studies
- Hybrid Renewable Energy Systems
- Chemical Looping and Thermochemical Processes
- Superconductivity in MgB2 and Alloys
- Adsorption and Cooling Systems
- Boron and Carbon Nanomaterials Research
- Thermal Expansion and Ionic Conductivity
- Boron Compounds in Chemistry
- Nuclear Materials and Properties
- Advanced Battery Materials and Technologies
- Chemical Synthesis and Characterization
- Advancements in Battery Materials
- Aerogels and thermal insulation
- Inorganic Chemistry and Materials
- Thermochemical Biomass Conversion Processes
- Phase Change Materials Research
- Carbon Dioxide Capture Technologies
- Advanced Chemical Physics Studies
- Crystallography and molecular interactions
- Thermal and Kinetic Analysis
- Radioactive element chemistry and processing
- High-pressure geophysics and materials
Curtin University
2014-2024
Aarhus University
2015-2021
United States Government Publishing Office
2020
Astronomy and Space
2015
Savannah River National Laboratory
2012
Commonwealth Scientific and Industrial Research Organisation
2010
Magnesium hydride owns the largest share of publications on solid materials for hydrogen storage. The group international experts contributing to IEA Task 32 Hydrogen Based Energy Storage recently published two review papers presenting activities focused magnesium based and Mg compounds energy This article not only overviews latest both fundamental aspects Mg-based hydrides their applications, but also presents a historic overview topic outlines projected future developments. Particular...
Magnesium hydride owns the largest share of publications on solid materials for hydrogen storage. The “Magnesium group” international experts contributing to IEA Task 32 “Hydrogen Based Energy Storage” recently published two review papers presenting activities group focused magnesium based and Mg compounds energy This article not only overviews latest both fundamental aspects Mg-based hydrides their applications, but also presents a historic overview topic outlines projected future...
Abstract One of the limitations to widespread use hydrogen as an energy carrier is its storage in a safe and compact form. Herein, recent developments effective high‐capacity materials are reviewed, with special emphasis on light compounds, including those based organic porous structures, boron, nitrogen, aluminum. These elements their related compounds hold promise high, reversible, practical capacity for mobile applications, vehicles portable power equipment, but also large scale...
The thermodynamic properties of magnesium hydride nanoparticles have been investigated by hydrogen decomposition pressure measurements using the Sieverts technique. A mechanochemical method was used to synthesize MgH2 (down ∼7 nm in size) embedded a LiCl salt matrix. In comparison bulk MgH2, mechanochemically produced with smallest particle size showed small but measurable decrease reaction enthalpy (ΔH 2.84 kJ/mol H2 from ΔHbulk = 74.06 ± 0.42 ΔHnano 71.22 0.49 H2). reduction ΔH matches...
A high-entropy alloy (HEA) of HfNbTiVZr was synthesized using an arc furnace followed by ball milling. The hydrogen absorption mechanism studied in situ X-ray diffraction at different temperatures and ex neutron experiments. body centered cubic (BCC) metal phase undergoes a transformation to tetragonal (BCT) hydride with occupying both tetrahedral octahedral interstitial sites the structure. Hydrogen cycling 500 °C is stable. large lattice strain HEA seems favorable for sites. HEAs therefore...
Abstract Hydrides based on magnesium and intermetallic compounds provide a viable solution to the challenge of energy storage from renewable sources, thanks their ability absorb desorb hydrogen in reversible way with proper tuning pressure temperature conditions. Therefore, they are expected play an important role clean transition deployment as efficient vector. This review, by experts Task 40 ‘Energy Storage Conversion Hydrogen’ Hydrogen Technology Collaboration Programme International...
Increased reliance on solar energy conversion technologies will necessarily constitute a major plank of any forward global supply strategy. It is possible that photovoltaic (PV) technology and concentrating thermal (CST) power play roughly equal, but complementary roles by 2050. The ability to increase CST during this period, however, be constrained number factors: the large plant sizes dictated economies scale, high associated transmission infrastructure investment cost, limitations current...
The purpose of this study is to compare the thermal and structural stability single phase Li2B12H12 with decomposition process LiBH4. We have utilized differential analysis/thermogravimetry (DTA/TGA) temperature programmed desorption-mass spectroscopy (TPD-MS) in combination X-ray diffraction (XRD) Fourier transform infrared (FTIR) products both LiBH4 up 600 °C, under vacuum hydrogen (H2) backpressure. synthesized highly pure crystalline anhydrous (Pa-3 structure type) studied its...
A series of monometallic borohydrides and borohydride eutectic mixtures have been investigated during thermal ramping by mass spectroscopy, differential scanning calorimetry, photography. Mixtures LiBH4–NaBH4, LiBH4–KBH4, LiBH4–Mg(BH4)2, LiBH4–Ca(BH4)2, LiBH4–Mn(BH4)2, NaBH4–KBH4, LiBH4–NaBH4–KBH4 all displayed melting behaviour below that the phases (up to 167 °C lower). Generally, each system behaves differently with respect their physical upon melting. The molten can exhibit colour...
Abstract Intense literature and research efforts have focussed on the exploration of complex hydrides for energy storage applications over past decades. A focus was dedicated to determination their thermodynamic hydrogen properties, due high gravimetric volumetric capacities, but application has been limited because harsh working conditions reversible release uptake. The present review aims at appraising recent advances different hydride systems, coming from proficient collaborative...
Abstract The development of efficient storage systems is one the keys to success energy transition. There are many ways store energy, but among them, electrochemical particularly valuable because it can electrons produced by renewable energies with a very good efficiency. However, solutions currently available on market remain unsuitable in terms capacity, recharging kinetics, durability, and cost. Technological breakthroughs therefore expected meet growing need for storage. Within framework...
We have studied the complex decomposition mechanism of cubic γ-Mg(BH4)2 (Ia3̅d, a = 15.7858(1) Å) by in-situ synchrotron X-ray diffraction, temperature-programmed desorption, visual observation melt, and Fourier transform infrared (FTIR) spectroscopy. The release hydrogen proceeds through eight distinct steps, including two polymorphic transitions before melting, with new ε-Mg(BH4)2 phase at ca. 150 °C. After strong changes in sample color from yellow to brown gray are consistent unknown...
The thermal decomposition of anhydrous Pa3[combining macron] Li2B12H12 was studied in situ by high resolution synchrotron X-ray diffraction. A first-order phase transition can be observed at 355 °C where the unit cell volume expands ca. 8.7%. expanded β-Li2B12H12 polymorph simultaneously decomposes to a hydrogen poor γ-Li2B12H12-x phase. Expansion across discontinuity is consistent with reorientational motion B12H12(2-) anions, and presence frustrated Li(+) lattice indicating Li ion conduction.
NaMgH3 has been considered as a potential hydrogen storage material and is an intermediary phase in number of complex-hydride destabilization reactions. Using careful pressure−composition−isotherm measurements, the equilibrium plateau was shown to be flat with negligible hysteresis. The enthalpy desorption, ΔH, found 86.6 ± 1.0 kJ/(mol H2) entropy, ΔS, 132.2 1.3 J/(mol H2 K), values lower than previously reported. high enthalpy, plateau, lack hysteresis make candidate solar heat medium.
Sodium compounds containing large weakly coordinating anions are explored as ion conductors. The halogenated sodium-closo-dodecaboranes (Na2B12Cl12, Na2B12Br12, and Na2B12I12) all isostructural (Pa3̅) at room temperature. These undergo an order–disorder polymorphic transition to Fm3̅m where Na+ partially occupies two crystallographic sites [B12X12]2– reorientational motion. dynamic structural properties promote extreme conductivity up 0.162 S/cm elevated temperature (500 °C). temperatures...
An economic assessment is performed on NaMgH<sub>2</sub>F and magnesium-based metal hydrides as heat storage materials for concentrating solar thermal power.
Abstract Silver compounds share a rich history in technical applications including photography, catalysis, photocatalysis, cloud seeding and as antimicrobial agents. Here we present class of silver (Ag 2 B 10 H Ag 12 ) that are semiconductors with bandgap at 2.3 eV the green visible light spectrum. The boranes have extremely high ion conductivity dynamic-anion facilitated + migration is suggested based on structural model. enhanced more than two orders magnitude room temperature (up to 3.2...
New sample environments and techniques specifically designed for in situ powder X-ray diffraction studies up to 1000 bar (1 = 10 5 Pa) gas pressure are reported discussed. The cells can be utilized multiple purposes a range of research fields. Specifically, investigations gas–solid reactions handling under inert conditions undertaken here. Sample containers allowing the introduction from one or both ends considered, enabling possibility flow-through studies. Various containment materials...