Here, the authors report results of their study on key characteristics microscale periodic Ni-Mg-Ni-Mg film structures as metal-hydride hydrogen accumulators, namely, microstructure, phase state, operation temperatures and rate sorption/desorption processes, complete reversible mass content hydrogen, enthalpy metal hydrides’ phase-formation. The has shown that hydride-formation films can be sat...

There seems some underlying technological interest in recent developments (1-9) in palladium alloy systems because of the possibilities of developing palladium alloys with improved characteristics for use as diffusion membranes for hydrogen purification and allied purposes (10). In addition to the important issues of surface kinetics and membrane thickness, other key factors for improved diffus...

Storage of hydrogen is one of the key challenges in developing hydrogen economy. Magnesium hydride (MgH2) is an attractive candidate for solid-state hydrogen storage for on-board applications. In this study, 10 wt.% ZrB2 was co-milled with magnesium hydride at different milling times to produce nanocrystalline composite powder. The effect of milling time and additive on the hydrogen desorption...

We report on highly resolved core-level and valence-band photoemission spectroscopies of hydrogenated, unreconstructed 6H-SiC(0001) and (0001̄) using synchrotron radiation. In the C 1s core level spectra of 6H-SiC(0001̄) a chemically shifted surface component due to C-H bonds is observed at a binding energy (0.4760.02) eV higher than that of the bulk line. The Si 2p core-level spectra of SiC(0001...

Currently, platinum-based electrocatalysts show the best performance for hydrogen evolution. All hydrogen evolution reaction catalysts should however obey Sabatier's principle, that is, the adsorption energy of hydrogen to the catalyst surface should be neither too high nor too low to balance between hydrogen adsorption and desorption. To overcome the limitation of this principle, here we choos...

The interaction of borazine (NsB,H,) with a Re(0001) surface has been studied by low energy electron diffraction (LEED), thermal desorption spectroscopy (TDS), Auger electron spectroscopy (AES) and electron energy loss spectroscopy (ELS). Two LEED patterns have been observed following borazine adsorption and annealing. One is the 2 X 2 structure, assigned to arise from atomic nitrogen. The othe...

The main goal of this work was to study the hydrogen interactions with carbon nanostructures (graphene grown on Pt(111), and carbon nanotube (CNT)/Pt composites) in lieu towards finding answers related to two bigger questions – (a) hydrogen storage possibility in carbon nanostructures and (b) band gap opening in graphene (for device applications). X-ray spectroscopy was used as the main experim...

We modeled the dynamics of hydrogen and deuterium adsorbed on palladium nanoparticles including the heat generation induced by the chemical adsorption and desorption, as well as palladium-catalyzed reactions. Our calculations based on the proposed model reproduce the experimental time-evolution of pressure and temperature with a single set of fitting parameters for hydrogen and deuterium inject...