Cyclic Voltammetry (CV), also known as Cyclic Polarization, is the most popular technique for electrochemists. It provides fast information about a system, allows to introduce a time scale and the results are often very visual.
A voltammetry is a technique where the potential is changed and the current is measured. Afterwards the current is plotted versus the potential to create a voltammogram.
A cyclic voltammogram consists of two linear sweeps of the working electrodes potential with two opposed slopes. The slope of the sweeps is equal except for the direction (- / +) and is called Scan Rate. CV is also known as cyclic polarization and could be described as two polarization curves.
The Cyclic Voltammogram is then the plot the two sweep’s current versus the potential.
This chapter is part of the series ‘Cyclic Voltammetry – the Most Used Technique’. In this final chapter we delve into catalytic processes.
This chapter is part of the series ‘Cyclic Voltammetry – the Most Used Technique’. Here we explain what information can be read from a cyclic voltammogram (CV) and how.
This chapter is the first part of the series ‘Cyclic Voltammetry – the Most Used Technique’. This introductory chapter goes into detail on cyclic voltammograms.
Moving from passive potentiometric experiments to potentiostatic experiments by controlling the potential was an important development. However, the step that followed towards potentiodynamic experiments may have been even more important for modern electrochemistry. Potentiodynamic experiments made it easy to collect all the data needed for a plot of current I versus potential E. These plots are called a voltammogram and the technique used for measuring is called voltammetry. In a short period of time the cyclic voltammetry (CV) provides a lot of information and allows kinetic investigations. It is by far the most used technique by PalmSens customers. Experienced electrochemists read quite some information from the shape of a CV.
Cyclic voltammetry is a known method of demonstrating the presence of a substance in a given liquid by drawing a graph with a characteristic wavy line. The graph has a typical, recognizable form in which the electron flow (current: i) is measured in Volt against the potential (E).