金属电极电化学振荡的研究进展  

Research Progress for Electrochemical Oscillation in the Metal Electrode

作　　者：丁莉峰[1] 刘凡[1] 武鹏[1] 

机构地区：[1]太原工业学院化学与化工系,山西太原030008

出　　处：《广东化工》2015年第22期111-113,123,共4页Guangdong Chemical Industry

摘　　要：电化学振荡是电化学体系中远离平衡的一种时空有序的现象。即恒电压或恒电流电解条件下,电流或电势会随时间周期性波动。电化学振荡现象广泛存在于Fe、Cu、Zn等金属及其氧化物的阴极电解、阳极电氧化等过程中。其中电化学振荡产生的原因主要有:电极表面物质周期性的溶解-沉淀形成;电极界面处中间价态离子周期性变化;电极表面气泡周期性产生导致电子得失反应减慢等。文章综述了各金属电极上产生电化学振荡的现象及其特征,分析了产生电化学振荡动力学行为的内在机制,从而为构建电化学体系的节能新方法、新途径提供理论基础。Electrochemical Oscillation is a spatiotemporal phenomenon, which is far from equilibrium in the electrochemical system. Current or potential periodically fluctuate over time in the electrolysis conditions of constant voltage or constant current. Electrochemical Oscillation phenomenon widely exists in the cathode electrolysis, anodic oxidation and other processes ofFe, Cu, Zn and other metals and its oxides. Main reasons of electrochemical oscillations produced are as follows： Material periodically dissolved-precipitated on the electrode surface; parity states ions cyclical changed at the interlace of electrode; the bubble generated periodically at the electrode surface, which lead to slow reactions of electronics gained and loosed; and so on. In the paper, we summarize the characteristics and phenomenon of electrochemical oscillation on the various metal electrodes, and analyze the kinetic behavior internal mechanism of electrochemical oscillations generated, in order to provide a theoretical basis for new methods and new ways of energy-saving in the electrochemical system.

关 键 词：电化学体系 电化学振荡 周期性 非线性动力学 节能 

分 类 号：TQ536[化学工程—煤化学工程]