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Voltammetry

About

Voltammetry is a technique that applies a potential to induce an electron transfer process and the current that flows due to the applied potential is measured. Major components that are involved in the voltammetry setup are the working electrode (WE), reference electrode (RE), counter electrode (CE), potentiostat and an electrochemical solution that contains analyte, electrolyte and solvent. The potential is applied between the WE vs. RE and the current is measured between the WE and CE. A negative potential is applied to induce a reduction, whereas, a positive potential is applied to induce an oxidation. For Cyclic Voltammetry (CV), the potential applied is cycled e.g. a negative potential is applied initially (reduction of [Fe(CN)6]3- to [Fe(CN)6]4-) which is followed by a positive potential (oxidation of [Fe(CN)6]4- to [Fe(CN)6]3-).

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