Cyclovoltammetrie — die „Spektroskopie”︁ des Elektrochemikers

Unter den klassischen Mesmethoden der elektroanalytischen Chemie geniest die Polarographie noch immer den hochsten Bekanntheitsgrad. In den letzten Jahren wurde ihr diese Position allerdings zunehmend von der Cyclovoltammetrie streitig gemacht. Einfach anzuwendende diagnostische Kriterien und eine relativ leicht zugangliche Mestechnik haben diese Entwicklung begunstigt. Die Attraktivitat der Methode resultiert weiterhin daraus, das sich aus Cyclovoltammogrammen neben Informationen uber die Thermodynamik von Redoxprozessen auch Kenntnisse uber die Kinetik von heterogenen Elektronentransferreaktionen sowie von angekoppelten chemischen Reaktionen erhalten lassen. Die charakteristischen Formen der Cyclovoltammogramme und die eindeutigen Potentiallagen der Peaks, die nahezu „fingerprint”-artig die elektrochemischen Eigenschaften von Redoxsystemen widerspiegeln, haben der Methode den Beinamen „elektrochemische Spektroskopie” eingetragen.

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