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Now showing items 60236-60255 of 143259
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Hydrogen production from aluminum-water reactions subject to high pressure and temperature conditions
(Massachusetts Institute of Technology, 2017)Aluminum fuel has become an attractive form of energy storage in recent years as it is both a highly abundant and extremely energy dense material. Research has discovered methods of treating aluminum with liquid metal, ... -
Hydrogen production from aluminum-water reactions subject to varied pressures and temperatures
(Elsevier BV, 2019-05)The production of hydrogen via an aluminum-water reaction is explored at temperatures and pressures ranging from 273.15 to 600 K and 0.1–10 MPa, respectively. Across this range, aluminum and water can react to form different ... -
Hydrogen production using a supercritical CO₂-cooled fast reactor and steam electrolysis
(Massachusetts Institute of Technology, 2007)Rising natural gas prices and growing concern over CO₂ emissions have intensified interest in alternative methods for producing hydrogen. Nuclear energy can be used to produce hydrogen through thermochemical and/or ... -
Hydrogen production via plasma reformers
(Massachusetts Institute of Technology, 1996) -
Hydrogen radiation transport modeling in ALCATOR C-Mod
(Massachusetts Institute of Technology, 1999) -
Hydrogen reionization in the Illustris universe
(Oxford University Press, 2015-09)Hydrodynamical simulations of galaxy formation such as the Illustris simulations have progressed to a state where they approximately reproduce the observed stellar mass function from high to low redshift. This in principle ... -
Hydrogen reverses the clustering tendency of carbon in amorphous silicon oxycarbide
(Nature Publishing Group, 2015-08)Amorphous silicon oxycarbide (SiOC) is of great technological interest. However, its atomic-level structure is not well understood. Using density functional theory calculations, we show that the clustering tendency of C ... -
Hydrogen Sensors from Composites of Ultra-small Bimetallic Nanoparticles and Porous Ion-Exchange Polymers
(Elsevier BV, 2020-10)Hydrogen (H2) is a flammable gas, and even tiny leaks of H2 must be detected for safety. However, the detection of low levels (below ppm) of H2 in air still remains an unmet challenge. Herein, we present a facile synthesis ... -
Hydrogen storage of energy for small power supply systems
(Massachusetts Institute of Technology, 2005)Power supply systems for cell phone base stations using hydrogen energy storage, fuel cells or hydrogen-burning generators, and a backup generator could offer an improvement over current power supply systems. Two categories ... -
Hydrogen Storage Potential of the Salina Group, Appalachian and Michigan Basins
(Massachusetts Institute of Technology, 2022-09)With rapidly changing technology and increasing social-political demand for decarbonization, the energy system is evolving globally and domestically. Adoption of hydrogen at scale as an energy carrier and a storage medium ... -
Hydrogen Sulfide Sensitizes Acinetobacter baumannii to Killing by Antibiotics
(Frontiers Media SA, 2020-08)The production of endogenous hydrogen sulfide (H₂S) has been shown to confer antibiotic tolerance in all bacteria studied to date. Therefore, this mediator has been speculated to be a universal defense mechanism against ... -
Hydrogen tunes magnetic anisotropy by affecting local hybridization at the interface of a ferromagnet with nonmagnetic metals
(American Physical Society (APS), 2020)© 2020 American Physical Society. Ionic control of magnetic properties, dubbed magneto-ionics, has gained much attention in recent years due to the sizable effects that can be induced by electrically controlled ion motion. ... -
Hydrogen tunes magnetic anisotropy by affecting local hybridization at the interface of a ferromagnet with nonmagnetic metals
(American Physical Society (APS), 2020-10)© 2020 American Physical Society. Ionic control of magnetic properties, dubbed magneto-ionics, has gained much attention in recent years due to the sizable effects that can be induced by electrically controlled ion motion. ... -
Hydrogen weakens interlayer bonding in layered transition metal sulfide Fe1+x S
(Royal Society of Chemistry (RSC), 2017-02)The presence of interlaminar interstitial defects like hydrogen affects the mechanical properties of van der Waals-bonded layered materials such as transition metal chalcogenides. While the embrittling effect of hydrogen ... -
Hydrogen-bonded layer-by-layer assembly of poly(vinyl alcohol) and tannic acid
(Massachusetts Institute of Technology, 2014)Hydrogen-bonded multilayer thin films containing tannic acid (TA) and poly(vinyl alcohol) (PVA) were assembled under different pH conditions, and film growth and dissolution behavior was assessed through profilometry. ... -
Hydrogen-Enhanced Vacancy Diffusion in Metals
(American Chemical Society (ACS), 2020)Copyright © 2020 American Chemical Society. Vacancy diffusion is fundamental to materials science. Hydrogen atoms bind strongly to vacancies and are often believed to retard vacancy diffusion. Here, we use a potential-of ... -
Hydrogen-Free Alkene Reduction in Continuous Flow
(American Chemical Society (ACS), 2013-01)The first continuous hydrogenation that requires neither H[subscript 2] nor metal catalysis generates diimide by a novel reagent combination. The simple flow reactor employed minimizes residence time by enabling safe ... -
Hydrogen-Induced Martensitic Transformation and Twinning in Fe45Mn35Cr10Co10
(Springer US, 2021-11-21)Abstract Hydrogen embrittlement can occur in steels with metastable phases, due to activation of the hydrogen-enhanced decohesion mechanism upon transformation. Meanwhile, recent investigations suggest that ... -
The hydrogen-induced piezoelectric effect in InP HEMTs
(Massachusetts Institute of Technology, 2003)Hydrogen exposure of III-V HEMTs has been shown to cause a threshold voltage shift, [delta] V[sub]T. This is a serious reliability concern. This effect has been attributed to a H-induced piezoelectric effect. Formation of ... -
Hydrogen-Induced Transformations in Metastable High Entropy Alloys
(Massachusetts Institute of Technology, 2021-06)Hydrogen embrittlement (HE) presents a critical challenge to application of structural alloys in hydrogen (H) environments. Recently, development of high-entropy alloys (HEAs) has opened a new avenue for alloy design against ...
