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Assessment of changes in desorption mechanism of MgH2 after ion bombardment induced destabilization
(International Journal of Hydrogen Energy, 2012)
This paper deals with non-isothermal kinetics models of hydrogen desorption from MgH2 altered by ion bombardment and stresses the importance of the MgH2 surface during its decomposition. In the case of argon-irradiated ...
Catalytic activity of titania polymorphs towards desorption reaction of MgH2
(Elsevier, 2016)
Hydrogen desorption properties of MgH2 ball milled with two different TiO2 polymorphs, rutile and anatase, were studied. Structural characterization has been done by X-ray diffraction (XRD) analysis, particle size analysis ...
Microstructure, surface properties and hydrating behaviour of Mg-C composites prepared by ball milling with benzene
(International Journal of Hydrogen Energy, 2006)
Mg-graphite composites, suitable for hydrogen storage, have been synthesized by ball milling metallic Mg with different amounts of graphite and benzene. The microstructure and the surface chemical composition have been ...
Hydrogenation properties of Hf-Ni intermetallics - Experimental and theoretical investigation
(International Journal of Hydrogen Energy, 2011)
The hydrogenation properties of HfNi and Hf(2)Ni(7) intermetallics were investigated at the constant pressure of 1 bar and in the temperature ranges 373-573 K for HfNi and 323-473 K for Hf(2)Ni(7). The kinetic parameters, ...
Hydridic, thermodynamic and kinetic properties of Hf2Ni intermetallic phase
(International Journal of Hydrogen Energy, 2009)
The intermetallic compound (HfNi)-Ni-2 was the subject of investigations by several methods. The relative stability was checked by calculating its enthalpy and cohesive properties, using the augmented plane wave plus local ...
Structural destabilisation of MgH(2) obtained by heavy ion irradiation
(International Journal of Hydrogen Energy, 2009)
MgH(2) powder samples have been irradiated with 120 keV Ar(+8) ions with different ion fluencies ranging from 10(12) to 10(16) ions/cm(2). irradiation effects are estimated by SRIM calculations, and investigated experimentally ...
Hydrogen storage in Laves phases: First principles study of electronic structure and formation energies in HfV2 hydrides
(International Journal of Hydrogen Energy, 2013)
We present first principles calculations of the electronic structure, enthalpies of formation and electric field gradients in C15 HfV2Hx (x = 1, 2, 3, 4). In C15 Laves phases, hydrogen can occupy three possible interstitial ...
Electrocatalytic effects of Mo-Pt intermetallics singly and with ionic activators. Hydrogen production via electrolysis
(International Journal of Hydrogen Energy, 2007)
The intermetallic phases along the Pt-Mo phase diagram, singly or in combination with specific ionic activators, have been investigated as cathode materials for the production of hydrogen by electrolysis from water KOH ...
Is platinum necessary for efficient hydrogen evolution? - DFT study of metal monolayers on tungsten carbide
(International Journal of Hydrogen Energy, 2013)
In this work WC-supported metal monolayers (Cu, Ru, Rh, Pd, Ag, Ir, Pt and Au) are investigated using Density Functional Theory in order to establish general trends regarding monolayer stability, electronic structure and ...
Performance comparison of modified poly(vinyl alcohol) based membranes in alkaline fuel cells
(International Journal of Hydrogen Energy, 2011)
There are several problems which are holding back the use of fuel cells. The utilization of fuel cells depends on the start-up costs which are very high due to the use of expensive materials for their construction. In that ...