Cyclic Voltammetry (CV) is a kind of electrochemical measurements. It is used for studying redox properties of chemicals. The three-electrodes method is the most widely used because the potential of reference is not easy to be changed in the measurement. This method needs reference electrode, working electrode, and counter electrode as electrode. Electrolyte is usually added to the compound solution to ensure sufficient conductivity. The combination of the solvent and the electrolyte determines the range of the potential. In this system, the potential is changed gradually and repeated like saw-thooth waveform because, the potential measured between the reference electrode and the working electrode, and the current measured between the working electrode and the counter electrode is plotted. The potential is changed linearly and the scan rate can be changed, so compounds are oxidized and reduced reversibly on the electrode. As a result, information about the redox potential and electrochemical reaction rates of the compounds are obtained.
