Abstract:
The present invention is directed to methods for making metal oxide compositions, specifically, metal oxide compositions having high surface area, high metal/metal oxide content, and/or thermal stability with inexpensive and easy to handle materials. In one embodiment, the present invention is directed to methods of making metal and/or metal oxide compositions, such as supported or unsupported catalysts. The method includes combining a metal precursor with an organic acid to form a mixture and calcining the mixture for a period of time sufficient to form a metal oxide material.
Abstract:
The invention provides a process for exfoliating a 3-dimenisonal layered material to produce a 2-dimensional material, said process comprising the steps of mixing the layered material in a solvent to provide a mixture; applying energy, for example ultrasound, to said mixture, and removing the energy applied to the mixture, such that sedimentation of the 2-dimensional material out of solution as a weakly re-aggregated, exfoliated 2-dimensional material is produced. The invention provides a fast, simple and high yielding process for separating 3-dimensional layered materials into individual 2-dimensional layers or flakes, which do not strongly re-aggregate, without utilising hazardous solvents.
Abstract:
A method for separating an amount of osmium from a mixture containing the osmium and at least one other additional metal is provided. In particular, method for forming and trapping OsO4 to separate the osmium from a mixture containing the osmium and at least one other additional metal is provided.
Abstract:
Nanoscale materials comprised of metal or metal oxide which are in the form of fibers or tubes or which have a porous structure can be prepared using composite fibers containing admixtures of polymers and metal precursors and/or metal oxide precursors.
Abstract:
Es wird Verfahren zur Herstellung von Beschichtungen aus Iridiumoxid beansprucht, welches die folgenden Schritte umfasst: a) Aufbringen von kolloidalem IrO X , worin x eine Zahl von 1 bis 2 bedeutet, auf eine Oberfläche, b) Trocknen der beschichteten Oberfläche und c) Brennen der Oberfläche bei einer Temperatur von 300 bis 1000°C, wobei die Schritte a bis c wiederholt werden können, bis die gewünschte Schichtdicke erhalten ist. Durch den Einsatz von kolloidalem IrO X als Ausgangskomponente zur Herstellung von Beschichtungen aus IrO X wird die Bildung toxischer Gase während des Brennens vermieden.
Abstract:
The present invention relates to water-soluble, mono-, di- and multi-metallic metal-oxide colloids as well as to a method for representing the same and to their fixation on a carrier. This method is characterised in that the targeted synthesis of soluble metal-oxide colloids is achieved by the controlled hydrolysis of a noble metal precursor in the presence of a water-soluble stabiliser. The metal-oxide colloids can be reduced according to the needs into corresponding metal colloids. The fixation of the nanoparticles on the carrier can be carried out both at the oxidised state or reduced state of said nanoparticles.
Abstract:
An electrode material comprised of hydrous metal oxide, such as ruthenium oxide, is annealed up to temperature just below the temperature at which the hydrous metal oxide would crystallize. Therefore, the hydrous metal oxide remains amorphous or non-crystalline. A hydrous metal oxide material treated in this manner provides a charge storage capacity and energy density greater than 747 F/g and 92 joules/gram, respectively, over 1 V range in a sulfuric acid electrolyte. This invention also provides a method of material preparation, wherein a sol-gel process is used to fabricate the hydrous metal oxides and wherein commercially available hydrous ruthenium oxide powders are treated and annealed.
Abstract:
The present invention relates to a method for esterification of a carboxylic acid or an anhydride with an alcohol in the presence of a ruthenium oxide catalyst, and a ruthenium oxide catalyst irradiated with gamma-rays.