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Solid hydrogen is the solid state of the element hydrogen, achieved by decreasing the temperature below hydrogen's melting point of 14.01 K (−259.14 °C; −434.45 °F).
23 Απρ 2020 · Solid hydrogen has a massive quantum zero-point energy (ZPE), far greater than its latent heat of melting, and has a Debye temperature well above melting. These factors determine the behavior of hydrogen in the dense state.
26 Ιαν 2017 · Metallic hydrogen may be a room-temperature superconductor and metastable when the pressure is released and could have an important impact on energy and rocketry. We have studied solid molecular hydrogen under pressure at low temperatures.
27 Μαΐ 2007 · The low-pressure phase I of solid hydrogen, which consists of freely rotating molecules on a hexagonal close-packed lattice 2, transforms at pressures of about 110 GPa to the broken-symmetry...
1 Ιαν 2015 · Hydrogen release temperatures range from 300 K to 600 K depending on the nature of the nanotubes [24]. It has also been suggested that the technique of reactive ball milling of the carbon nanotube material in hydrogen atmosphere for prolonged duration result in higher hydrogen adsorption [24] .
However, catalysts for the effective storage of hydrogen must be advanced. Many solid hydrogen storage materials such as magnesium-based hydrides, alanates, and/or borohydrides display promising hydrogen densities far superior to the current state of compressed or liquid hydrogen.
20 Νοε 2019 · Extensive experimental and theoretical studies have been devoted to determining the high-pressure phase diagram of hydrogen. We present evidence of a phase at a higher pressure than phase III and below the pressure of the recently observed phase of metallic hydrogen (495 GPa).
