Gas Diffusion Electrodes for the eltrochemical industry

The prefered technology for chemical reactions are electrochemical processes, as they have the highest efficiency toward costs and ecology. The running costs are very low and you do not have to care for solvents etc. The reaction is simply controlled by the voltage and current. By the use of gas diffusion electrodes these processes could be extended, as you are now able to provide the reaction with a controlled amount of gas. Gas diffusion electrodes have to offer simultaneously space for fluids and gases.

It is provided by a dry mixing process, which spins the basic materials - PTFE, catalyst and additives. PTFE forms a liquid repellent matrix which binds the catalyst and the liquid attracting materials. These materials are rolled to a thin, flexible, endless sheet. We bring an additional screen into this flexible sheet, providing the electrode with a higher mechanical stability and a lower ohmic resistance. For some purposes we add an additional porous, water repelling PTFE-sheet onto the electrode.

The standard electrodes work with hydrogen, oxygen and ammonia. They are used in fuel cells, electrolyzers hydrogen reference electrodes. Experience has been made with silver-, platinum-, carbon-, copper-, nickel-catalysts and oxidic materials. Other catalysts can be used by customer request.