A5083720720- Hydrogen Storage and Materials
- Ammonia Synthesis and Nitrogen Reduction
- Nuclear Materials and Properties
- Boron and Carbon Nanomaterials Research
- Hybrid Renewable Energy Systems
- Superconductivity in MgB2 and Alloys
- Advanced Chemical Physics Studies
- Rare-earth and actinide compounds
- High-pressure geophysics and materials
- Inorganic Chemistry and Materials
- Advanced Battery Materials and Technologies
- Advancements in Battery Materials
- Inorganic Fluorides and Related Compounds
- Extraction and Separation Processes
- MXene and MAX Phase Materials
- Mass Spectrometry Techniques and Applications
- Fusion materials and technologies
- Quantum, superfluid, helium dynamics
- Technology Assessment and Management
- Fuel Cells and Related Materials
- Laser-induced spectroscopy and plasma
- Glass properties and applications
- Food Industry and Aquatic Biology
- activated carbon and charcoal
- Advanced Battery Technologies Research
Pacific Northwest National Laboratory
2013-2024
Richland College
2014-2021
Battelle
2009-2017
Sandia National Laboratories California
2005-2012
University of Utah
2009-2010
Sandia National Laboratories
2008
Jet Propulsion Laboratory
2008
National Institute of Advanced Industrial Science and Technology
2003-2005
Stockholm University
1995-2004
Midorigaoka Hospital
2002
Ultrafine Pt nanoparticles were successfully immobilized inside the pores of a metal-organic framework, MIL-101, without aggregation on external surfaces framework by using "double solvents" method. TEM and electron tomographic measurements clearly demonstrated uniform three-dimensional distribution ultrafine NPs throughout interior cavities MIL-101. The resulting Pt@MIL-101 composites represent first highly active MOF-immobilized metal nanocatalysts for catalytic reactions in all three...
Magnesium hydride (MgH(2)) is an attractive candidate for solid-state hydrogen storage applications. To improve the kinetics and thermodynamic properties of MgH(2) during dehydrogenation-rehydrogenation cycles, a nanostructured MgH(2)-0.1TiH(2) material system prepared by ultrahigh-energy-high-pressure mechanical milling was investigated. High-resolution transmission electron microscope (TEM) scanning TEM analysis showed that grain size milled powder approximately 5-10 nm with uniform...
Conditions have been found whereby it is possible to reversibly store >11 wt% hydrogen through the direct hydrogenation of MgB(2) Mg(BH(4))(2).
Magnesium and magnesium-based alloys are considered attractive candidates as rechargeable hydrogen storage materials because of their high capacities (theoretically up to 7.6 wt %), reversibility, low cost. In this work, the hydrogenation nanocrystalline magnesium at room temperature in presence TiH(2) was studied. The derived by dehydrogenation nanostructured MgH(2)-0.1TiH(2) prepared using an ultra-high-energy high-pressure planetary milling technique. Significant uptake observed. results...
Metal hydrides can be utilized for hydrogen storage and thermal energy (TES) applications. By using TES with solar technologies, heat stored from sun to used later, which enables continuous power generation. We are developing a technology based on dual-bed metal hydride system, has high-temperature (HT) operating reversibly at 600–800 °C generate heat, as well low-temperature (LT) near room temperature that is during hours until there the need produce electricity, such night time, cloudy day...
The hydrogen storage reaction ScH2 + 2LiBH4 → ScB2 2LiH 4H2 (8.91 wt %), based on the thermodynamic destabilization of LiBH4, is predicted to have a enthalpy ΔH300K = 34.1 kJ/mol H2. isothermal kinetic desorption behavior in this system was measured. At temperatures up 450 °C, less than 5 % H2 released, which only half theoretical capacity. Powder X-ray diffraction data indicate that LiBH4 has decomposed into LiH final product, but provide no evidence participated reaction. Magic angle...
Calcium borohydride, containing almost 12 wt % of hydrogen, is one the most promising and actively studied materials for hydrogen storage. However, experimental diffraction spectra indicate more than crystal structure depending on synthesis technique temperature. Two structures, ground-state in symmetry Fddd, or F2dd elevated temperature polymorph P42/m, are presumed known. We identify three low energy candidates Ca(BH4)2 predicted by methods prototype electrostatic ground states (PEGS)...
Magnesium-based alloys are promising candidates as potential hydrogen storage materials due to their inherent high contents. Small particle size which can be achieved by milling and small amounts of transition-metal compounds catalysts result in increased release/uptake kinetics. In this work, we examined the effects various parameters TiH2 content on dehydrogenation properties Mg−Ti−H system. The samples were prepared with different using methods conditions. activation energy enthalpy...
Ammonia borane (AB = NH3BH3) is one of the most attractive materials for chemical hydrogen storage due to its high contents 19.6 wt. %; however, impurity levels borazine, ammonia, and diborane in conjunction with foaming exothermic release calls finding ways mitigate decomposition reactions. In this paper we present a solution by mixing AB metal hydrides (TiH2, ZrH2, MgH2, CaH2) which can control from upon decomposition. The composite were prepared mechanical ball milling, their H2...
Ammonia borane (AB), NH3BH3, is a promising material for chemical hydrogen storage with 19.6 wt% gravimetric capacity of which maximum 16.2 can be released via an exothermic thermal decomposition below 200 °C. We have investigated the kinetics release from AB and AB-methyl cellulose (AB/MC) composite at temperatures 160-300 °C using both experiments modeling. The rate 300 twice as fast 160 purpose our study was to show safe without runaway effects validate system model kinetics. AB/MC ∼20...
Spatio-temporal mapping of species in a femtosecond laser induced Zircaloy-4 plasma identified conditions well-suited for the detection and analysis deuterium across wide range concentrations.