PHYSICAL-AND-CHEMICAL FEATURES AND MECHANISM OF COPPER OXIDE (I) FORMATION IN ALKALINE CHLORIDE SOLUTIONS
Ключевые слова:
copper oxide (I), complex copper chloride, equilibrium potentials, thermodynamics, diagram of equilibrium systems.Аннотация
The most promising ways to obtain highly dispersed copper oxides are electrochemical methods. This
method of transferring copper into a solution allows finding accurately the formation modes of the required valence
ion and obtaining high chemical purity compounds. The methods of producing copper oxide (I) are based on the
anodic oxidation of metallic copper in an alkaline chloride-containing solution. The main advantage of the
electrochemical method is the possibility of obtaining high quality powder with a smaller particle size not containing
metallic copper and bivalent copper oxide. The results of studying anodic corrosion of copper in weakly alkaline and
acidic chloride solutions show that, depending on the content of chloride ions in the solution and the specified
potential value, there can be formed complex copper chloride compounds that in the process of hydrolysis form
copper oxide (I) powder. The region of thermodynamically stable existing of monovalent copper chloride complexes
at low potential values and pH increases.
In this work there has been for the first time made the calculation and a diagram has been constructed that
allows determining only the most probable pH, pCl–
and the electrode region, in which copper oxide (I) can be
obtained.
