Question

What Does Cyclic Voltammetry Tell You?

Answer 1

Hint: Cyclic voltammetry is a technique used in electrochemistry utilised for the measured current evolved in an electrochemical cell. It is denoted by CV and is conducted by cycling the potential of a working electrode and calculating the resulting current.

Complete Step by Step Answer:
A CV system has an electrolysis cell, a potentiostat, a current-to-voltage converter, and a data system.
The electrolysis cell has a working electrode, counter electrode, reference electrode, and electrolytic solution.
The objective of the electrolytic solution is to furnish ions to the electrodes during the redox reaction i.e., oxidation and reduction.
The working electrode’s potential is altered such that time and potential have a linear relationship, while the reference electrode retains a uniform potential.
The current-to-voltage converter estimates the resulting current, and the data system creates a graph called a voltammogram.
The counter electrode conducts electricity from the signal source to the working electrode.
A voltammogram is a graph that plots cell current against the potential between the working electrode and reference electrode acquired from a voltammetry experiment.
A potentiostat is an electronic appliance that utilises a direct current power source to create a potential that can be retained and precisely specified while permitting small currents to be pulled into the system and not altering the voltage.
So, cyclic voltammetry tells us about the amount of current produced by the working electrode's cycling process.

Note: Cyclic Voltammetry can be employed to review qualitative information about electrochemical procedures under different conditions, like the presence of intermediates in oxidation-reduction reactions, the reversibility of a reaction, etc. It can also be employed to specify the electron stoichiometry of a system, the diffusion coefficient of an analyte, and the formal reduction potential.