超混沌电流对金属锰电解阳极电位振荡的调控

金属锰湿法电冶过程是一个典型的远离平衡态的非线性体系，直流作用下会出现电化学振荡、金属分形等非线性行为而引发体系额外的能耗。本文提出一种超混沌电流电解的新模式，通过引入超混沌电路代替原有直流电源来实现。超混沌电流作用下，采用恒电流极化曲线、阳极极化曲线、塔菲尔测试等分析方法和X射线衍射分析、扫描电子显微镜的表征方法，研究铅合金阳极电化学振荡行为与阳极沉积的锰氧化物之间的关联。研究结果表明，在电流密度为350 A·m?2恒电流极化30 min后，超混沌电流极化作用下电位振荡的平均振荡周期较直流极化提高5.6 s，平均振幅降低 38 mV；超混沌电流作用下阳极生成的MnO₂，其表面较为致密平整，在一定程度上可以提高铅合金阳极析氧反应活性和耐腐蚀性。综合分析可知，将超混沌电流运用于金属锰电解过程，可以实现对阳极电化学振荡的有效调控，为进一步降低电解过程能耗和污染排放提供新思路。 

Regulation of anodic potential oscillation in manganese metal electrolysis by hyperchaotic current

Manganese metal electrolysis is a typical nonlinear system far from the equilibrium state. In this case, nonlinear behaviors such as electrochemical oscillation and metal fractal occur in the electrode reaction process. The multiple valence state changes of manganese and the nonlinear coupling of multiple chemical reactions cause the electrolytic process to be unstable and unmanageable, and increase extra energy consumption. Therefore, a study regarding the physical and chemical processes of the electrode/solution interface will help in revealing the electrode reaction mechanism and elaborate the nonlinear behaviors of the interface reaction process. This should control the electrode reaction process more effectively and regulate the entire process more efficiently. This paper presents a new mode of chaotic current electrolysis by introducing a hyperchaotic circuit instead of the original direct current power supply. Galvanostatic polarization, anode polarization, the Tafel test, X-ray diffraction, and scanning electron microscopy were employed to analyze the relationship between the electrochemical oscillation behavior and anodic deposited manganese oxides on lead alloy anodes. Research results show that the potential oscillation behavior of the anode is suppressed to a certain extent. The average oscillation period was increased by 5.6 s, and the average oscillation amplitude was reduced by 38 mV compared with direct current polarization after 350 A·m?2 constant current polarization for 30 min. This would help to reduce the generation of anode slime and additional energy consumption during electrolysis. At the same time, the deposited MnO₂ on the anode under hyperchaotic current had a dense and flat surface, which improved the oxygen evolution reaction activity and the corrosion resistance of the lead alloy anode. The comprehensive analysis demonstrated that the application of hyperchaotic current to manganese metal electrolysis could achieve effective regulation of anode electrochemical oscillation, providing a new insight for the further reduction in the energy consumption and pollution emission in the electrolysis process.