2022-03-082022-03-082000https://publica.fraunhofer.de/handle/publica/304734DE 29916125 U UPAB: 20000524 NOVELTY - The electrode includes a large-area layer (3) of doped diamond on a body (1, 2). The diamond layer follows surface structuring of the body. DETAILED DESCRIPTION - Preferred features: The body is a self-passivating metal. Between body and diamond layer, an intervening layer (4) of bonding agent resists oxidation during electrolysis. The core (1) of the body is electrically-conductive and surrounded by a casing (2) of the self-passivating metal. The body comprises expanded metal. It has uniformly-distributed points, edges and/or further locations enhancing anode reaction. The body is alternatively disc-shaped and includes holes of uniform size and/or uniformly-distributed V-shaped incisions. In a development, a cell producing ultrahigh purity water has a pressure-resistant casing containing an electrode as described, an ion exchange membrane and a counter-electrode. USE - For the electrochemical production of ozone and/or ultra high purity water. ADVANTAGE - Conventional lead dioxide electrodes used to produce ozone when making ultra-pure water are a design and mechanical weakness, limiting the cell life. They fall apart in any event, if not continuously positively-polarized. A buffer is needed and further disadvantages accrue. These problems are overcome by the reliable electrode disclosed. Diamond coating solves the problem, yet, amazingly, diamond is normally an insulator. Specific resistivity is low: 0.01-10 Ohm cm.de608667utility model1998-19842396