The electrode potential determines whether an electrochemical reaction can occur and its reaction rate. Selective redox reactions can be achieved or the electrochemical reaction rate can be controlled by adjusting the electrode potential. Reduction reactions are limited to the transfer of electrons and can be directly achieved by passing current from an external circuit into an electrochemical workstation, without the need to introduce other chemicals as oxidants or reducing agents, which is beneficial for the purity of the reaction system.High precision electrochemical workstationMany reactions can achieve different reaction rates due to the use of electrodes made of different materials, in which case the electrodes act as catalysts. According to the high or low electrode potential in the equipment, there are four different technical methods:

1. Pulse technology: differential pulse voltammetry, square wave pulse method, differential pulse current method, differential conventional pulse voltammetry, conventional pulse voltammetry.

2. Voltammetric techniques: open circuit potential, cyclic voltammetry, cyclic potential absorption, chronoamperometry, chronopotentiometry, potentiodynamic, dynamic current, large amplitude sine voltammetry, alternating current voltammetry.

3. Electrochemical impedance technology: constant potential AC impedance, constant current AC impedance, step constant potential AC impedance, step constant current AC impedance.

4. Corrosion technology: linear and cyclic polarization, comprehensive corrosion, pitting corrosion, polarization resistance monitoring, zero resistance ammeters ZRA, ZVC, variable amplitude sine micro polarization, constant amplitude sine micro polarization.

　　High precision electrochemical workstationThe electrical measurement method using a small amplitude sine wave potential as the disturbance signal, if a sine wave electrical signal is applied to the system as the disturbance signal, the system will generate a response signal with the same frequency as the disturbance signal. The ratio between response signals of different frequencies and disturbance signals can be used to obtain the modulus and phase angle of impedance at different frequencies, and further calculate the real and imaginary parts of impedance.