Abstract: The present invention relates to a method for the production of a catalyst composition, wherein a support material in the form of carbon particles is impregnated with a platinum compound in an aqueous medium, and the impregnated support material is contected with a reducing agent in the aqueous medium while stirring at a pH in the range of 3.5-6.0 and a Reynolds number of the stirrer of at least 50,000.

Abstract: A known method for producing porous graphitized carbon material covered with metal nanoparticles involves infiltrating a porous template framework of inorganic material with a carbon precursor. After thermal treatment of the precursor, the template is removed and the particulate porous carbon material is covered with a catalytically active substance. According to the invention, in order to keep the proportion of the noble metal loading at a low level, the thermal treatment of the precursor first involves carbonization, and the material is not graphitized into graphitized, particulate, porous carbon material until the template has been removed. The graphitized carbon material has a hierarchical pore structure with a pore volume of at least 0.5 cm3/g and at least 75% of the pore volume is apportioned to macropores with, size 100 to 5000 nm. Before covering with catalytically active substance, the carbon material is subjected to an activation treatment in an oxidizing atmosphere.

Abstract: A known method for producing porous graphitized carbon material covered with metal nanoparticles involves infiltrating a porous template framework of inorganic material with a carbon precursor. After thermal treatment of the precursor, the template is removed and the particulate porous carbon material is covered with a catalytically active substance. According to the invention, in order to keep the proportion of the noble metal loading at a low level, the thermal treatment of the precursor first involves carbonization, and the material is not graphitized into graphitized, particulate, porous carbon material until the template has been removed. The graphitized carbon material has a hierarchical pore structure with a pore volume of at least 0.5 cm3/g and at least 75% of the pore volume is apportioned to macropores with, size 100 to 5000 nm. Before covering with catalytically active substance, the carbon material is subjected to an activation treatment in an oxidizing atmosphere.

Abstract: The present invention relates to phase change materials (PCMs) for the storage of thermal energy in the form of phase change heat, and to the use thereof.

Abstract: The present invention relates to phase change materials (PCMs) for the storage of thermal energy in the form of phase change heat based on lithium nitrate trihydrate, and to the use thereof.

Abstract: Thermal energy in the form of heat of phase transformation can be stored in a ternary salt mixture of the formula: ANO3+LiNO3+Mg(NO3)2.6H2O.

Abstract: The invention relates to a process for the preparation of vinylene carbonate of the formula (I) 1

Abstract: The invention relates to a process for the preparation of vinylene carbonate of the formula (I) by reacting a monohaloethylene carbonate of the formula (II) in which X is a halogen atom, with a dehydrohalogenating agent at elevated temperature in the presence of an organic solvent, characterized in that the organic solvent employed is ethylene carbonate. The process according to the invention enables vinylene carbonate to be prepared in a simple manner and in high yield. The vinylene carbonate prepared in accordance with the invention can be used for various applications.

Abstract: The invention relates to a process for producing an accumulator composite comprising evacuating an impregnation vessel after partially or completely immersing a matrix in a phase change material in the impregnation vessel.

Abstract: The present invention relates to the use of phase change materials in devices for cooling electrical and electronic components.

Abstract: The present invention generally relates to compositions for storing heat energy in the form of heat of phase transition, and to their use. The compositions of the invention for storing heat comprise at least one heat storage material and at least one auxiliary and are characterized in that the composition comprises at least one heat storage material which has at least one solid/solid phase transition and is solid throughout the application range.