| 摘要 |
Producing (P1) an oxygen-consuming electrode, involves: precipitating silver oxide by metering silver salt solution to an initial charge of an alkaline solution and then stirring suspension over a period of at most 10 minutes, in the course of which the temperature of suspension is kept at 10-50[deg] C; removing precipitated silver oxide from suspension; drying silver oxide at 80-200[deg] C, optionally under reduced pressure; and processing resulting silver oxide with an electrically conductive support material, catalyst comprising silver particles, and finely divided fluorinated polymer. Producing (P1) an oxygen-consuming electrode, involves: (a) precipitating silver oxide by metering a silver salt solution to an initial charge of an alkaline solution and then stirring the suspension over a period of at most 10 minutes, in the course of which the temperature of the suspension is kept at 10-50[deg] C; (b) removing the precipitated silver oxide from step (a) from the suspension; (c) drying the silver oxide at a temperature of 80-200[deg] C, optionally under reduced pressure; and (d) further processing the resulting silver oxide with an electrically conductive support material, a catalyst comprising silver particles, and a finely divided fluorinated polymer to give a flat oxygen-consuming electrode. Independent claims are included for the following: (1) an oxygen-consuming electrode at least comprising an electrically conductive support, an electrical contact site, and a gas diffusion layer containing a catalytically active component, where the gas diffusion layer comprises at least one fluorinated polymer, silver in the form of silver particles and silver oxide in the form of silver oxide particles, produced by the process (P1); and (2) an electrolysis cell for the electrolysis of an alkali metal chlorides, comprising the oxygen-consuming electrode (T1) as the cathode. |
