Oxidation, solvent and acid resistant platinum wire counter electrode
Widely used in standard cyclic voltammetry electrochemistry cells
Platinum wire counter electrodes, in either polytetrafluoroethylene (PTFE) or polyether ether ketone (PEEK) plastic bodies, are solvent and acid resistant. They are widely used in standard cyclic voltammetry electrochemistry cells due to their resistance to oxidation.
A platinum wire or coil is typically used as a counter electrode.
What is a Counter Electrode?
Counter electrodes are also referred to as auxiliary electrodes. The counter electrode is usually used in a 3-electrode electrochemical cell system to complete the electrical circuit without passing significant current through the reference electrode.
Current is recorded as electrons flowing through the working electrode and the counter electrode. The potential of the counter electrode is normally not measured in the 3-electrode system, and is adjusted to balance the reaction occurring at the working electrode.
In the case when reduction occurs at the working electrode, oxidation takes place at the counter electrode. To avoid oxidised species generated at the counter electrode interfering and contaminating with any ongoing reactions at the working electrode, the counter electrode sometime can be physically separated from the working electrode compartment using a glass frit.
In a 2-electrode system, the surface area of the counter electrode should be greater than the surface area of the working electrode to ensure that the kinetics of the reaction occurring at the counter electrode do not inhibit those occurring at the working electrode.
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To the best of our knowledge the technical information provided here is accurate. However, Ossila assume no liability for the accuracy of this information. The values provided here are typical at the time of manufacture and may vary over time and from batch to batch.