▶ Working Electrode

Working Electrode; The potential value varies depending on the concentration of ingredient of the measured solution.

It is a source for electronic exchange of molecules, with the purpose of allowing current to flow in electrode reactions.

The reaction from the electrodes is sometimes referred to as the cathode / anode depending on the oxidation / reduction reaction.

A suitable working electrode is subject to a number of conditions, It depends on the range of potential available and the kinetic of the electronic transmission response.

The criteria for selecting Working Electrode are as follows. 

* Criteria for selecting the type of work electrode and the potential window

* PotentialWindow’s (-) : Decision by reduction

* PotentialWindow’s (+) : Decision by oxidation reaction

① Platinum Working Electrode

The advantages and disadvantages of Pt Working Electrode

② Gold Working Electrode

The advantages and disadvantages of Au Working Electrode

(It is almost same to Platinum)

③ Glassy Carbon Working Electrode

The advantages and disadvantages of Glassy Carbon Working Electrode  

- Carbon materials are nonmetallic, but with good electrical and thermal conductors, corrosion resistant and heat resistant is very superior

- Can be used in various experiments as potential windows are wide in the direction of oxidation and reduction.

- Carbon electrodes can scan more negative potential than platinum or gold.

* Corrosion resistant : Characteristic against corrosion.