Abstract: The present invention relates to a hydrogen-storing composite material which is convertible essentially reversibly between a storing state and a non-storing state, wherein the reaction enthalpy in this conversion reaction can be set in a targeted manner to a value between 15 and 80 kJ/mol of H2, preferably 25 to 40 kJ/mol of H2.

Abstract: The present invention concerns a method of activating or regenerating a hydrogen storage material which contains at least one metal hydride. The at least one metal hydride is brought into contact with an inert solvent and the inert solvent is subsequently removed again. After contacting with and removal of the inert solvent, there is not only an increase in the reaction rate but surprisingly the hydrogenation also proceeds more completely. The present method is particularly advantageous when the hydrogen storage material contains at least components which interact with one another during absorption and desorption.

Abstract: The present invention relates to a hydrogen-storing composite material which is convertible essentially reversibly between a storing state and a non-storing state, wherein the reaction enthalpy in this conversion reaction can be set in a targeted manner to a value between 15 and 80 kJ/mol of H2, preferably 25 to 40 kJ/mol of H2.

Abstract: The invention relates to a metal-containing, hydrogen-storing material which contains a catalyst for the purpose of hydration or dehydration, said catalyst being a metal carbonate. The method for producing such a metal-containing, hydrogen-storing material is characterized by subjecting the metal-containing material and/or the catalyst in the form of a metal carbonate to a mechanical milling process.

Abstract: The present invention concerns a method of activating or regenerating a hydrogen storage material which contains at least one metal hydride. The at least one metal hydride is brought into contact with an inert solvent and the inert solvent is subsequently removed again. After contacting with and removal of the inert solvent, there is not only an increase in the reaction rate but surprisingly the hydrogenation also proceeds more completely. The present method is particularly advantageous when the hydrogen storage material contains at least components which interact with one another during absorption and desorption.

Abstract: The invention relates to a composite material storing hydrogen. Said composite material can alternate, in an essentially reversible manner, between a storage state and a non-storage state and optionally at least on intermediate state. In the storage state thereof, the system comprises the following constituents: (a) at least one first hydride constituent and (b) at least one second constituent that is at least one hydrogen-free constituent and/or one other hydride constituent. The at least one first hydride constituent and the at least one second constituent are in a first solid multiphase system, and during the changeover to the non-storage state of the system, the at least one first hydride constituent reacts with the at least one second constituent, forming H2, in such a way that, in the non-storage state, at least one other hydrogen-free compound and/or alloy is formed and another solid multiphase system is created.

Abstract: In an apparatus and a method for the analysis of atomic or molecular elements contained in a sample by wavelength dispersive X-ray spectrometry, wherein primary x ray or electron radiation is directed onto the sample whereby fluorescence radiation is emitted from the sample, the fluorescence radiation is directed onto a mirror or focussing device consisting of a multi-layer structure including pairs of layers of which one layer of a pair comprises carbon or scandium and the other comprises a metal oxide or a metal nitride and the fluorescence radiation is reflected from the mirror or focussing device onto an analysis detector for the analysis of the atomic or molecular elements contained in the sample.

Abstract: In a metalliferous storage material for hydrogen a metal oxide is provided in or on the surface of the metalliferous materialas a catalyst for the hydrogenation or dehydrogenation of the metalliferous storage material.

Abstract: In a device and a method for the analysis of atomic and molecular elements by way of wavelength dispersive x-ray spectrometric structures including at least one mirror or focussing device having a multi-layer structure onto which fluorescent radiation generated by primary x-ray or electrons beams from a sample to be examined is directed and the reflected fluorescence radiation is supplied to a measuring device for determining the nature of impurities contained in the sample, the multi-layer structure consists of at least a lanthanum layer and a boron carbide layer.

Abstract: In a process of producing nanocrystalline metal hydrides, an elemental metal hydride of a first kind is subjected to a mechanical milling process with at least one elemental metal or at least one additional metal hydride to produce an alloy hydride.

Abstract: An X-ray analysis apparatus having a curved paraboloid-shaped curved graded multilayer Bragg reflector (5) is characterized in that the layers of the reflector (5) are directly introduced onto a concave curved surface of a paraboloid-shaped hollow substrate and a maximum allowable shape deviation for the concave substrate surface facing the reflector is &Dgr;p={square root over (2px)} &Dgr;&thgr;R, and having a maximum allowable waviness Δ ⁢   ⁢ y Δ ⁢   ⁢ x = 1 2 ⁢ Δθ R and a maximum allowable roughness &Dgr;y=d/2&pgr;, preferentially &Dgr;y≦0.