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:
Nov. 15, 2011
Filed:
Jul. 09, 2005
Roland Beckmann, Luenen, DE;
Karl-heinz Dulle, Olfen, DE;
Peter Woltering, Neuenkirchen, DE;
Randolf Kiefer, Gelsenkirchen, DE;
Frank Holthuis, Dortmund, DE;
Frank Funck, Muelheim, DE;
Wolfram Stolp, Hamm, DE;
Hans-joachim Kohnke, Kassel, DE;
Joachim Helmke, Calden, DE;
Roland Beckmann, Luenen, DE;
Karl-Heinz Dulle, Olfen, DE;
Peter Woltering, Neuenkirchen, DE;
Randolf Kiefer, Gelsenkirchen, DE;
Frank Holthuis, Dortmund, DE;
Frank Funck, Muelheim, DE;
Wolfram Stolp, Hamm, DE;
Hans-Joachim Kohnke, Kassel, DE;
Joachim Helmke, Calden, DE;
UHDE GmbH, Dortmund, DE;
Gaskatel Gessellschaft Fuer Gassysteme Durch Katalyse und Elektrochemie mbH, Kassel, DE;
Abstract
The invention relates to a method for producing electrically conducting nickel oxide surfaces made of nickel-containing material. According to the method, the nickel surface is first degreased and is then roughened for approximately ten minutes in a solution containing about one percent of hydrochloric acid, the process being accelerated by adding hydrogen peroxide solution, resulting in the electrolyte turning green. The nickel surface is briefly wetted, the nickel material is introduced into a solution of 3.5 molar lye to which about ten percent of hydrogen peroxide is added and is kept therein for ten minutes, and the resulting nickel hydroxide surface is dehydrated in a subsequent thermal process and is then further oxidized to obtain nickel oxide. The invention further relates to a conductive boundary layer that is produced according to the method, the electrodes therefrom, and the use thereof in chlorine-alkali electrolysis processes, in fuel cells and storage batteries.