Umicore Ag & Co Kg

Daniel Herein

Liesbet Jongen

Alexander Hofmann

Dan V Goia

Marco Lopez

Barry W L Southward

Carsten Becker

Fei Wen

Igor V Sevonkaev

Barbara Klose-Schubert

The present invention is concerned with the use of certain oxygen storage components. In particular, the use of special mixed oxides as oxygen storage components in exhaust catalysis is disclosed.

Use of mixed oxides as oxygen storage components

The present invention is concerned with oxygen storage materials. In particular an oxygen storage material (OSM) is proposed which comprises a certain mixed oxide as the oxygen storage component. The oxygen storage material can be used in conventional manner in three-way catalysts or NOx-storage catalysts for example.

Oxygen storage materials

The invention relates to a carbon-free electrocatalyst for fuel cells, containing an electrically conductive substrate and a catalytically active species, wherein the conductive substrate is an inorganic, multi-component substrate material of the composition 0X1-0X2, in which 0X1 means an electrically non-conductive inorganic oxide having a specific surface area (BET) in the range of 50 to 400 mVg and 0X2 means a conductive oxide. The non-conductive inorganic oxide 0X1 is coated with the conductive oxide 0X2. The multi-component substrate preferably has a core/shell structure. The multi-component substrate material 0X1-0X2 has an electrical conductivity in the range&#x3e;0.01 S/cm and is coated with catalytically active particles containing noble metal. The electrocatalysts produced therewith are used in electrochemical devices such as PEM fuel cells and exhibit high corrosion stability.

Electrocatalyst for fuel cells and method for producing said electrocatalyst

The present invention is directed to hollow catalyst particles comprising a layered shell structure and to a method of their manufacture. The catalyst particles have the general formula H/PM/IL/PMin which His the hollow core, PMis a precious metal forming the innermost layer of the shell, IL is an intermediate layer comprising a base metal/precious metal alloy, and PMis a precious metal forming the outermost layer of the shell. The precious metal is selected from Pt, Ir and Pd and mixtures or alloys thereof, and IL is an intermediate layer comprising a base metal/precious metal alloy wherein the concentration of the base metal changes from the periphery of the hollow core to the outer surface of the intermediate layer. The base metal is selected from Co, Ni, and Cu and mixtures thereof.

Catalyst particles comprising hollow multilayered base metal-precious metal core/shell particles and method of their manufacture

The present invention is directed to a process for the production of ion-exchanged (metal-doped, metal-exchanged) Zeolites and Zeotypes, In particular, the method applied uses a sublimation step to incorporate the ion within the channels of the Zeolitic material. Hence, according to this dry procedure no solvent is involved which obviates certain drawbacks connected with wet exchange processes known in the art.

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Frankfurt-am-Main, Germany

Daniel Herein