Pulse current electrodeposition of manganese metal from sulfate solution

Add time:08/13/2019    Source:sciencedirect.com

In this study, pulse current (PC) electrodeposition method was successfully introduced to the process of manganese electrodeposition. The results showed that, due to the transient high current density, pulse electrolysis can rise cathode overpotential (larger 90–100 mV than the direct current (DC)) at the same current density. And high cathode overpotential can significantly suppress the hydrogen evolution and improve the reaction rate of manganese deposit. At the same time, the higher cathode potential promotes crystal nucleus formation, which tends to get smooth manganese metal product surface. Through electrolysis experiment, it was found that when the pulse frequency was 500Hz, the duty ratio was 0.5, the average current density was 300A/m2, after electrolysis for 2h under the condition, the current efficiency can reach 88.3%, being improved by 8.72% and anode slime was 0.49g, being reduced by 55.5% compare to 300A/m2 of DC electrodeposition. In addition, PC electrodeposition method may have a certain significance to the development of electrolytic manganese industry.

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