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Electrodes
Electrodes are conductive materials that transmit electrical current in a medium. They can be solid (e.g. made of a metal or carbon) or liquid (e.g. made of mercury). If an electrode is brought into contact with an electrolyte, an electrochemical reaction takes place at the electrode/electrolyte phase boundary.
An electrochemical experiment usually requires at least three electrodes: working electrode, counter electrode and reference electrode. The reaction of interest takes place at the working electrode. To determine the potential of the working electrode, an additional electrode (reference electrode) is introduced into the measuring arrangement as a potential reference point. This has a constant and easily reproducible equilibrium potential over time. The counter electrode finally has the task of closing the circuit.
Various disk electrodes, microelectrodes, rotating disk electrodes (RDE/RRDE), wire electrodes, screen printed electrodes (SPE), pH electrodes, ion-selective electrodes or reference electrodes and more can be found on the websites of our partner companies. If you cannot find the material or electrode type you are looking for in the catalog, many manufacturers offer the option of producing customized electrodes. Just ask us.
We will be happy to help you!