MnO2 is similar in catalytic properties to Pt, but its cost is much lower. In some publications, manganese dioxide was used as natural highly selective catalyst for the decomposition of H2O2. The material is environmentally friendly and quite easily formed on the surface of the substrate. Particular attention is paid to the methods of its formation. Most researchers prefer time-consuming thermochemical or sol-gel techniques for the formation of dioxide , . , , . However, the formation of MnO2 by electrochemical methods is a fast and easy process. There are a number of publications , , , where electrochemically deposited MnO2 was used as a catalyst, but the effect of the effect of the electrolytes, pH, electroplating technique and other conditions of film formation is not described. By changing such deposition conditions as the potential, concentrations and pH of the electrolyte, it is easy to influence on the structure and composition of thin films of MnO2. The electrocatalytic activity of electrodes depends on these factors .