METHOD OF MAKING RUTHENIUM ELECTRODES FOR ELECTROCHEMICAL SENSOR WITH SOLID ELECTROLYTE

FIELD: chemistry. ^ SUBSTANCE: present invention pertains to the technology of making electrodes on a solid electrolyte from stabilised zirconium dioxide, and can be used for making electrochemical solid electrolyte sensors for concentration of oxygen in different oxygen-containing gases. The essence of the invention lies in that, to make a ruthenium electrode, ruthenium is deposited on a degreased and activated surface of a solid electrolyte, through recovery of ruthenium from an aqueous solution of rutheniumhexamine (II) chloride, containing 0.2-0.4 g/dm3 ruthenium per 1 cm2 of the covered surface. Acidity of the solution is established by adding a solution of potassium hydroxide with concentration ranging from 0.36 g/l to 0.78 g/l to the reaction system. The process takes place at temperature of 170-210°C in an enclosed volume for 130-180 minutes. ^ EFFECT: reduced power input through lowering temperature, number of operations and duration of the process, as well as reduced temperature at which the electrode starts working. ^ 3 cl, 1 tbl