| A new electrochemical oscillatory system of bromate in alkaline solution |
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| 作者姓名： | JIANG Xiao-chun LI Ze-lin YIN Jian-jun |
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| 作者单位： | 1.College of Chemistry and Applied Chemistry，Huanggang Normal University，Huangzhou 438000，Hubei，China;2.College of Chemistry and Chemical Engineering，Hunan Normal University，Changsha 410081，Hunan，China |
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| 摘 要： | A new electrochemical oscillatory system of bromate in alkaline solution is reported.In Pt-Bromate-Alkaline solution system,two different types of electrochemical oscillations(Type Ⅰ and Type Ⅱ) can be observed.Type Ⅰ appears before hydrogen evolution and Type Ⅱ involves periodic hydrogen evolution.Type Ⅰ relates to the adsorption/desorption of the hydrogen on platinum electrode,and Type Ⅱ with periodic oscillation stems from the coupling of electrochemical reactions(the reduction of bromate and evolution hydrogen reaction) with mass transfer(diffusion and convection).More over,under the right conditions,the two types appear in different oscillatory modes,for example,simple periodical mode and mixed one,etc..Crossed cycle in the cyclic voltammograms,which is the basic characteristics for electrochemical oscillatory systems,has also been observed as expected.
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| 关 键 词： | 电气化振荡系统 溴酸钾 碱性溶液 氢 交叉循环 |
| 文章编号： | 1003-8078(2007)06-0026-04 |
| 修稿时间： | 2007年7月10日 |
A new electrochemical oscillatory system of bromate in alkaline solution |
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| JIANG Xiao-chun,LI Ze-lin,YIN Jian-jun.A new electrochemical oscillatory system of bromate in alkaline solution[J].Journal of Huanggang Normal University,2007,27(6):26-29. |
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| Authors: | JIANG Xiao-chun LI Ze-lin YIN Jian-jun |
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| Institution: | 1. College of Chemistry and Applied Chemistry, Huanggang Normal University, Huangzhou 438000, Hubei, China
2. College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, Hunan, China |
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| Abstract: | A new electrochemical oscillatory system of bromate in alkaline solution is reported. In PtBromate-Alkaline solution system, two different types of electrochemical oscillations (Type Ⅰ and Type Ⅱ) can be observed. Type Ⅰ appears before hydrogen evolution and Type Ⅱ involves periodic hydrogen evolution. Type Ⅰ relates to the adsorption/desorption of the hydrogen on platinum electrode, and Type Ⅱ with periodic oscillation stems from the coupling of electrochemical reactions (the reduction of bromate and evolution hydrogen reaction) with mass transfer (diffusion and convection). More over, under the right conditions, the two types appear in different oscillatory modes, for example,simple periodical mode and mixed one, etc,, Crossed cycle in the cyclic voltammograms, which is the basiccharacteristics for electrochemical oscillatory systems, has also been observed as expected. |
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| Keywords: | potassium bromate reduction hydrogen evolution crossed cycle electrochemical oscillations |
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