Magnetized/charged MgH2-based hydrogen storage materials

Tsuda, Muneyuki; Diño, Wilson Agerico; Kasai, Hideaki; Nakanishi, Hiroshi
May 2005
Applied Physics Letters;5/23/2005, Vol. 86 Issue 21, p213109
Academic Journal
We propose two methods to facilitate the Mg–H bond cleavage of magnesium hydride MgH2. We found via density functional calculations that Mn (or Fe), when inserted between two MgH2, exhibits a much higher catalytic activity than the other 3d transition metal elements because of the induced spin polarization of the MgH2. We also found that an ionized MgH2 (MgH2+) has considerably softer Mg–H bonds. We can thus significantly reduce the H2 desorption temperatures from MgH2 to practical levels, ∼400 K, by forming an alloy hydride with Mn (or Fe), and/or ionizing the MgH2.


Related Articles

  • Chiroptical properties from time-dependent density functional theory. II. Optical rotations of small to medium sized organic molecules. Autschbach, Jochen; Patchkovskii, Serguei; Ziegler, Tom; van Gisbergen, Stan J. A.; Jan Baerends, Evert // Journal of Chemical Physics;7/8/2002, Vol. 117 Issue 2, p581 

    We report an implementation for the computation of optical rotations within the Amsterdam Density Functional program package. The code is based on time-dependent density functional response theory. Optical rotations have been calculated for a test set of 36 organic molecules with various density...

  • Sky conditions for Viking polarization navigation are under test.  // Laser Focus World;Jan2012, Vol. 48 Issue 1, p20 

    The article reports on a study conducted by a team of European researchers to investigate how Vikings sailed across the North Atlantic Ocean using birefringent crystals to find the direction of skylight polarization. To examine 150,000 points in the sky for varying degrees of cloudiness, a...

  • Transition metal dimer on Au(111) surface: A first principle study. Sahoo, Suman Kalyan; Nigam, Sandeep; Sarkar, Pranab; Majumder, Chiranjib // AIP Conference Proceedings;6/5/2012, Vol. 1447 Issue 1, p473 

    The adsorption behaviour of transition metal dimers M2 (M= Cu, Ag, Au) on the Au(111) surface have been studied using the density functional theory formalism. The projector augmented wave method under the spin polarized version of generalized gradient approximation scheme was employed to...

  • Symmetry conditions for studying torsion stress-induced gradient piezogyration. Kvasnyuk, O.; Zapeka, B.; Vasylkiv, Yu.; Kostyrko, M.; Vlokh, R. // Ukrainian Journal of Physical Optics;2013, Vol. 14 Issue 2, p91 

    We have analyzed a gradient piezogyration effect induced by torsion stresses in optical materials belonging to different point groups of symmetry. It has been shown that the effect manifests itself as a rotation of light polarization plane only in the tetragonal and cubic crystals and textures...

  • Manifestation of gyrotropy upon light scattering in paratellurite. Vorontsova, E.; Grechishkin, R.; Kaplunov, I.; Kolesnikov, A.; Molchanov, V.; Talyzin, I.; Tret’yakov, S. // Optics & Spectroscopy;Jun2008, Vol. 104 Issue 6, p886 

    Upon scattering of laser radiation at different wavelengths, three optical effects—rotation of the plane of polarization of linearly polarized light, dependence of the specific rotation on the radiation wavelength, and the dependence of the scattered light intensity on the angle between...

  • Simulation Study of Deposition Parameters for Elliptical-Shaped Preforms by VAD for Polarization-Maintaining Fibers. Fujiwara, Eric; Ono, Eduardo; Suzuki, Carlos K. // AIP Conference Proceedings;10/1/2008, Vol. 1055 Issue 1, p145 

    A novel fabrication method of elliptical-shaped preforms for polarization-maintaining fibers, developed using the VAD technology and based on the variation of the perform rotation velocity from zero to a maximum velocity in repeated cycles of 180°, allows modifying and controlling the preform...

  • Manifestation of optical activity in crystals of different symmetry classes. Konstantinova, A. F.; Evdishchenko, E. A.; Imangazieva, K. B. // Crystallography Reports;Nov2006, Vol. 51 Issue 6, p998 

    Specific features of manifestation of optical activity in cubic, uniaxial, and biaxial crystals are described. The effect of optical activity on characteristics of transmitted light is considered as a function of the wavelength of incident light, temperature, and the orientation the optical...

  • Shift and asymmetry of the saturated absorption resonance in the field of counterpropagating elliptically polarized waves. Brazhnikov, D. V.; Taichenachev, A. V.; Tumaikin, A. M.; Yudin, V. I.; Velichansky, V. L.; Zibrov, S. A. // Journal of Experimental & Theoretical Physics;Jul2009, Vol. 109 Issue 1, p11 

    The saturated absorption resonance in an atomic gas in the field of counterpropagating light waves with an arbitrary elliptical polarization is investigated. A conclusion about the peculiarities of the resonance shape is drawn from a general analysis of the symmetry of the problem. In...

  • High-responsivity plasmonics-based GaAs metal-semiconductor-metal photodetectors. Karar, Ayman; Das, Narottam; Leong Tan, Chee; Alameh, Kamal; Tak Lee, Yong; Karouta, Fouad // Applied Physics Letters;9/26/2011, Vol. 99 Issue 13, p133112 

    We report the experimental characterization of high-responsivity plasmonics-based GaAs metal-semiconductor-metal photodetector (MSM-PD) employing metal nano-gratings. Both the geometry and light absorption near the designed wavelength are theoretically and experimentally investigated. The...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics