析氧電極的制備與性能測試
[Abstract]:In the process of metal electrodeposition, the electrode is in the "core" position. Therefore, it is necessary to select the suitable electrode material during the electrodeposition of chloride solution. For a long time, the electrode materials used in chlor-alkali industry require large surface area, good conductivity, high catalytic activity, long service life and low cost, but many materials are difficult to meet these requirements. Moreover, many scholars ignore the harm caused by chlorine gas produced during electrolysis to the health of workshop workers. In the electrolytic chloride system, when the metal is enriched by electrodeposition, a large amount of chlorine gas will be produced in the electrolysis process due to the high concentration of Cl in the electrolyte. In practical production, the chlorine gas produced not only harms the health of workshop workers, but also pollutes the environment seriously, affects the quality of metal deposited by electrodeposition, and changes the properties of electrolyte. Many workshops use lye to absorb chlorine gas, which is used to solve a series of problems caused by the formation of chlorine gas. However, when the chlorine gas is absorbed with lye, the cost will be increased. In this paper, the oxygen evolution potential and chlorine evolution potential of different electrodes were measured in order to select an electrode with lower oxygen evolution potential than chlorine evolution potential. There has been little research on the electrode with low oxygen evolution potential. Therefore, considering the harm of chlorine to the health of workshop workers, it is necessary to study an electrode with low oxygen evolution potential in the process of metal deposition in chloride solution. At the same time, considering the cost, in the preparation of electrode, try to use non-precious metals instead of precious metals. It is more urgent to develop electrode material which can be used in acidic medium with low oxygen evolution potential. In this paper, the preparation technology of titanium substrate coating electrode is studied firstly, including the temperature of preparation, the preparation method of outer layer and so on. The purpose of this study is to prepare an electrode suitable for use in strong acidic solution (pH = 2 渭 3) at high current density, and the oxygen evolution potential of the electrode is lower than that of chlorine evolution potential. Then, three types of electrodes were studied, including carbon series electrodes (carbon cloth electrode, carbon felt electrode, viscose base felt), titanium series electrode (prepared A electrode, titanium matrix iridium tantalum coated electrode). The oxygen evolution potential, chlorine evolution potential and electrode life of the three types of electrodes were studied by using Ti series ruthenium-iridium coated electrode and lead-silver electrode. Finally, the experiment was summarized and prospected. The Ti-based ruthenium-iridium coated electrode was selected from the studied electrode, which was most suitable for use in strong acidic solution and high current density.
【學(xué)位授予單位】:蘭州交通大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2014
【分類號】:TQ150.6
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