Active electrodes

Definition

Active electrodes are the electrodes in an electrochemical cell where the redox reactions occur. They participate directly in the chemical reactions by either gaining or losing electrons.

5 Must Know Facts For Your Next Test

1. Active electrodes undergo oxidation or reduction during the operation of the cell.
2. The material of active electrodes changes as they take part in the electrochemical reactions.
3. In a Galvanic cell, one electrode serves as the anode (oxidation) and the other as the cathode (reduction).
4. Active electrodes can be made from metals, non-metals, or composite materials depending on their reactivity and stability.
5. The potential difference between active electrodes drives the flow of electrons through an external circuit.

Review Questions

Related terms

Anode:

The electrode where oxidation occurs, resulting in a loss of electrons.

Cathode:

The electrode where reduction occurs, leading to a gain of electrons.

Redox Reactions:

\text{Chemical reactions that involve the transfer of electrons between two species.}