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Your search keyword '"Riidiger Bormann"' showing total 2 results
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2 results on '"Riidiger Bormann"'

1. Hydrogen Motion in Magnesium Hydride by NMR

Author

Ashley C. Stowe, Ragaiy Zidan, Robert L. Corey, Riidiger Bormann, Martin Dornheim, Jaques Huot, Erik A. Carl, David T. Shane, Robert C. Bowman, Mark S. Conradi, Timothy M. Ivancic, and José M. Bellosta von Colbe

Subjects
Hydrogen, Diffusion, Relaxation (NMR), Magnesium hydride, Analytical chemistry, chemistry.chemical_element, Activation energy, Surfaces, Coatings and Films, Electronic, Optical and Magnetic Materials, Catalysis, Chemical kinetics, Paramagnetism, chemistry.chemical_compound, General Energy, Nuclear magnetic resonance, chemistry, Physical and Theoretical Chemistry
Abstract

In coarse-grained MgH2, the diffusive motion of hydrogen remains too slow (

Published
2008

2. Catalytic Mechanism of Transition-Metal Compounds on Mg Hydrogen Sorption Reaction

Author

Riidiger Bormann, Thomas Klassen, and Gagik Barkhordarian

Subjects
Valence (chemistry), Hydrogen, Chemistry, Magnesium, digestive, oral, and skin physiology, Inorganic chemistry, chemistry.chemical_element, Sorption, Surfaces, Coatings and Films, Catalysis, Ion, Hydrogen storage, Transition metal, Materials Chemistry, Physical and Theoretical Chemistry
Abstract

The catalytic mechanisms of transition-metal compounds during the hydrogen sorption reaction of magnesium-based hydrides were investigated through relevant experiments. Catalytic activity was found to be influenced by four distinct physico-thermodynamic properties of the transition-metal compound: a high number of structural defects, a low stability of the compound, which however has to be high enough to avoid complete reduction of the transition metal under operating conditions, a high valence state of the transition-metal ion within the compound, and a high affinity of the transition-metal ion to hydrogen. On the basis of these results, further optimization of the selection of catalysts for improving sorption properties of magnesium-based hydrides is possible. In addition, utilization of transition-metal compounds as catalysts for other hydrogen storage materials is considered.

Published
2006

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