Question

The auxillary electrode in polarography is​

Answer 1

The auxiliary electrode, often also called the counter electrode, is an electrode used in a three electrode electrochemical cell for voltammetric analysis or other reactions in which an electric current is expected to flow.

Answer 2

The Auxillary electrode in polarography is the counter electrode.

• The counter electrode is a part of three electrodes in electrochemical electrodes. It is usually used in reactions where there is an allowance of electric flow.
• This electrode is an inert element that helps in measuring the current flow between the two electrodes ( working electrode and counter electrode).
• The potential of the working electrode against the reference electrode is measured through the counter electrode. A few examples of counter electrodes are platinum, graphite, and glassy carbon.
• Counter electrodes usually act as electron sources or sink for the electrochemical electrodes.
• For the reaction of the electrodes to be fast, the surface area of the electron sink should be larger than the working electrodes.