työelektroodilla

Työelektrodi refers to the working electrode in electrochemistry. It is the electrode where the electrochemical reaction of interest takes place. In a typical electrochemical cell, there are at least two electrodes: the working electrode and the counter electrode. A third electrode, the reference electrode, is often included to provide a stable potential against which the working electrode's potential is measured.

The working electrode is crucial for electrochemical analysis and synthesis. Its surface properties, such as material composition, roughness, and cleanliness, can significantly influence the kinetics and selectivity of the electrochemical reactions. Common materials for working electrodes include platinum, gold, glassy carbon, and various metal oxides, chosen based on their electrochemical properties and compatibility with the analyte or reaction system.

In voltammetry, the potential of the working electrode is systematically varied, and the resulting current is measured. This current response provides information about the redox properties of the species in solution. In electrolysis, the working electrode serves as the site for either oxidation (anode) or reduction (cathode) of a target molecule, enabling chemical synthesis or material deposition. Understanding and controlling the conditions at the working electrode is fundamental to achieving desired electrochemical outcomes.