FIELD: chemistry.
SUBSTANCE: deposition of noble metals is improved by a combination of electroextraction and cementation processes. At the same time, the cathode potential at the electroextraction stage should be negative - 0.6 V relative to the normal hydrogen equivalent in order to ensure the chemical stability of the precipitating material and at the same time to guarantee the cathodic deposition of noble metals.
EFFECT: deposition rate, the degree of extraction, and the content of the final product are increased in comparison with the known methods.