A feasibility of obtaining hybrid nanosystems consisting of copper, copper oxides, tetragonal or cubic oxide tungsten bronze (OTB) by means of electrodeposition from the polytungstate melts at 973 and 1023 K was studied. The formation regularities of various hybrid nanosystems were established based on a data of electrochemical techniques, X-ray diffraction phase analysis (XRD), and scanning electron microscopy (SEM). A Cu (mesh)/Cu2O/OTB hybrid system with catalase activity was obtained during electrodeposition from the K2WO4 - Na2WO4 (1:1) - 50 mol% WO3 melt at 973 K. (C) 2019 The Electrochemical Society.