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首頁 > 技術文章 > RDE旋轉圓盤電極的應用與使用

RDE旋轉圓盤電極的應用與使用

2014-07-30 [3293]
      RDE旋轉圓盤電極應用在電分析化學、電極過程和均相化學反應的研究，電極自身旋轉時，溶液在電極表面進行層流運動，擴散層厚度隨轉速的變化而變化，根據極限擴散電流方程式，可以準確測定擴散電流。本產品適用于高等院校、科研單位、環境監測等部門。
旋轉圓盤電極的使用方法：
　　在測量時電極浸入測量溶液不宜太深，一般以2～3mm為宜。電極的轉速要適當，太慢時自然對流起主要作用，太快時則會出現湍流，不能得到有效參數。要求在旋轉過程中保證電極表面出現層流狀態。
　　旋轉圓盤電極的極限擴散電流密度公式，由V.G.Levich(前蘇聯)于1942年提出，Levich方程如下，極限擴散電流iL是研究電化學動力學的重要參數。如果在不同轉速條件下測得iL值，作iL-ω1/2圖，可求出D；用標準溶液標定后可測反應物種的濃度，常用于定量分析。
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