Uhde Gmbh

Varta Geratebatterie Gmbh

Fatpower, Inc.

Gaskatel Gessellschaft Fuer Gassysteme Durch Katalyse Und Elektrochemie Mbh

Gaskatel Gmbh

Gaskatel Gesellschaft Für Gassysteme Durch Katalyse Und Elektrochemie Mbh

Hans-Joachim Kohnke

Joachim Helmke

Peter Woltering

Randolf Kiefer

Dejan Ilic

Konrad Holl

Frank Funck

Karl-Heinz Dulle

Roland Beckmann

August Winsel

Gabi Balan

Wolfram Stolp

Thomas Steinmetz

Kosmas Janowitz

Torsten Dresel

Frank Holthuis

Michael Schmalz

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.

Method for the production of nickel oxide surfaces having increase conductivity

An electrolysis cell includes an inner chamber containing a stack of porous anode and cathode plates with separators therebetween. Electrolyte is circulated through the porous anodes and cathodes in the inner chamber to generate hydrogen and oxygen gas. A plurality of electrolysis cells can be mounted together to form an electrolyzer unit.

Electrolyzer

With the help of a method for production of a gaseous diffusion electrode from a silver catalyst on PTFE-substrate, it is endeavored to achieve results which can be reproduced, by avoiding the disadvantages of the state-of-the-art technology, whereby this is achieved in that

Method for producing gas diffusion electrodes

An electrochemical gas sensor has a first gas diffusion electrode for a first reaction gas, which is inactive with respect to a second reaction gas at least in a first potential window, and a second gas diffusion electrode for the second reaction gas, which is active with respect to the second reaction gas at least in a second potential window for measuring two different gases in gas mixtures in a casing. The two gas diffusion electrodes are electronically isolated from one another, but electrically connected electrolytically to a reversibly loadable electrode and have contacts for connecting external closing circuits for adjusting the cell currents. The gas mixture is fed to the gas diffusion electrodes in series or parallel. The casing containing the electrodes is, in particular, in the form of a button cell. The reversibly loadable electrode is a Cu/CuO, Zn/ZnO or hydrogen electrode. The gas diffusion electrodes have a porous structure based on carbon or have a porous silver structure.

Electrochemical gas sensor

Method and apparatus for determining O2 and N2O in gas mixtures

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Kassel, Germany

Hans-Joachim Kohnke