Production of Copper Powders by Alternating Current Polarization of a Copper–Titanium Electrode Pair
Bayeshov A. Bayeshova A.K. Zhylysbayeva A.N. Kadirbayeva A.S. Nurdillayeva R.N.
May 2022Pleiades journals
Russian Journal of Applied Chemistry
2022#95Issue 5685 - 688 pp.
Abstract: The possibility of obtaining copper powders using alternating current of industrial frequency is shown. The electrochemical circuit consisted of two cells connected in parallel. A copper–titanium electrode pair was installed in each cell. The electrolyte was an aqueous solution containing copper(II) sulfate. In cell 1, during electrolysis, the copper electrode dissolves in the positive half-cycle with the formation of Cu2+, which are reduced on the titanium electrode to Cu0 in the form of a dispersed powder. In cell 2 in this half-cycle, the electrolysis does not occur. When the direction of the current is changed, electrolysis occurs only in cell 2. It was found that when the current density changes in the range of 10–75 kA m–2, the current efficiency of Cu0 in each cell increases from 31 to 85.2%. When the concentration of Cu2+ varies within 5–10 g L–1, the current efficiency of Cu0 in each cell increases to 84.2%. As a result of the process, ultrafine copper powders are formed. Scanning electron microscopy has shown that the average particle size of copper powders does not exceed 1 µm.
alternating current , copper electrode , half cycles , polarization , titanium electrode , ultrafine copper powders
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Sokolsky Institute of Fuel, Catalysis and Electrochemistry, Almaty, 050010, Kazakhstan
Al-Farabi Kazakh National University, Almaty, 050040, Kazakhstan
South Kazakhstan State Pedagogical University, Shymkent, 160012, Kazakhstan
Khoja Akhmet Yassawi International Kazakh-Turkish University, Turkistan, 161200, Kazakhstan
Sokolsky Institute of Fuel
Al-Farabi Kazakh National University
South Kazakhstan State Pedagogical University
Khoja Akhmet Yassawi International Kazakh-Turkish University
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