The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 12, 2011
Filed:
Oct. 29, 2004
Marco Lopez, Frankfurt, DE;
Andreas Schleunung, Grossostheim-Ringheim, DE;
Peter Biberbach, Rodenbach, DE;
Marco Lopez, Frankfurt, DE;
Andreas Schleunung, Grossostheim-Ringheim, DE;
Peter Biberbach, Rodenbach, DE;
Umicore AG & Co. KG, Hanau-Wolfgang, DE;
Abstract
The invention is directed to iridium oxide based catalysts for use as anode catalysts in PEM water electrolysis. The claimed composite catalyst materials comprise iridium oxide (IrO) and optionally ruthenium oxide (RuO) in combination with a high surface area inorganic oxide (for example TiO, AlO, ZrOand mixtures thereof). The inorganic oxide has a BET surface area in the range of 50 to 400 m/g, a water solubility of lower than 0.15 g/l and is present in a quantity of less than 20 wt. % based on the total weight of the catalyst. The claimed catalyst materials are characterised by a low oxygen overvoltage and long lifetime in water electrolysis. The catalysts are used in electrodes, catalyst-coated membranes and membrane-electrode-assemblies for PEM electrolyzers as well as in regenerative fuel cells (RFC), sensors, and other electrochemical devices.