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Full-Text Articles in Physics
Deuterium Mas Nmr Studies Of Mg-Ti Deuteride Formed During High Pressure Ball Milling, Samuel Emery
Deuterium Mas Nmr Studies Of Mg-Ti Deuteride Formed During High Pressure Ball Milling, Samuel Emery
Arts & Sciences Electronic Theses and Dissertations
Magnesium hydride has long been considered a candidate onboard hydrogen storage material for hydrogen fuel cell powered vehicles due to its low cost, abundance (of magnesium metal), and high hydrogen content (7.6 wt%). However, its use has been limited by the poor kinetics and thermodynamics of the reversible hydriding/dehydriding reaction. Improvements to hydrogen uptake and release have been previously demonstrated when Mg is alloyed with Sc. The resulting MgSc-hydride adopts a cubic, fluorite crystal structure (as opposed to the rutile, tetragonal structure for bulk MgH2) that exhibits a significantly lower activation energy for thermally driven hydrogen motion. However, Sc is …
Functionalized Nanoporous Carbon Scaffolds For Hydrogen Storage Applications, Christopher Carr
Functionalized Nanoporous Carbon Scaffolds For Hydrogen Storage Applications, Christopher Carr
Dissertations
Recent efforts have demonstrated confinement in porous scaffolds at the nanoscale can alter the hydrogen sorption properties of metal hydrides, though not to an extent feasible for use in onboard hydrogen storage applications, proposing the need for a method allowing further modifications. The work presented here explores how the functionalization of nanoporous carbon scaffold surfaces with heteroatoms can modify the hydrogen sorption properties of confined metal hydrides in relation to non-functionalized scaffolds (FS). Investigations of nanoconfined LiBH4and NaAlH4indicate functionalizing the carbon scaffold surface with nitrogen can shift the activation energy of hydrogen desorption in excess of …
Functionalized Nanoporous Carbon Scaffolds For Hydrogen Storage Applications, Christopher L. Carr
Functionalized Nanoporous Carbon Scaffolds For Hydrogen Storage Applications, Christopher L. Carr
Doctoral Dissertations
"Recent efforts have demonstrated confinement in porous scaffolds at the nanoscale can alter the hydrogen sorption properties of metal hydrides, though not to an extent feasible for use in onboard hydrogen storage applications, proposing the need for a method allowing further modifications. The work presented here explores how the functionalization of nanoporous carbon scaffold surfaces with heteroatoms can modify the hydrogen sorption properties of confined metal hydrides in relation to non-functionalized scaffolds (FS). Investigations of nanoconfined LiBH4 and NaAlH4 indicate functionalizing the carbon scaffold surface with nitrogen can shift the activation energy of hydrogen desorption in excess of …