Rotated electrode voltammetry
Encyclopedia
Rotated electrode voltammetry, a subclass of voltammetry
, is technique in which the working electrode
usually a rotating disk electrode
(RDE) or rotating ring-disk electrode
(RRDE) is rotated at a very high rate (2000 to 10,000 (?) RPM). This asserts some control over the mass transport process which brings the analyte
to the electrode surface. This technique was made popular through the work of the Russian electrochemist, Benjamin Levich. This technique is useful for studying the kinetics
and electrochemical reaction mechanism
for a half reaction. This technique is part of a larger class of electroanalytical methods known as hydrodynamic voltammetry (see also hydrodynamics).
Voltammetry
Voltammetry is a category of electroanalytical methods used in analytical chemistry and various industrial processes. In voltammetry, information about an analyte is obtained by measuring the current as the potential is varied.- Three electrode system :...
, is technique in which the working electrode
Electrode
An electrode is an electrical conductor used to make contact with a nonmetallic part of a circuit...
usually a rotating disk electrode
Rotating disk electrode
A rotating disk electrode is a hydrodynamic working electrode used in a three electrode system. The electrode rotates during experiments inducing a flux of analyte to the electrode. These working electrodes are used in electrochemical studies when investigating reaction mechanisms related to...
(RDE) or rotating ring-disk electrode
Rotating ring-disk electrode
A rotating ring-disk electrode is double working electrode used in hydrodynamic voltammetry, very similar to a rotating disk electrode . The electrode actually rotates during experiments inducing a flux of analyte to the electrode...
(RRDE) is rotated at a very high rate (2000 to 10,000 (?) RPM). This asserts some control over the mass transport process which brings the analyte
Analyte
An analyte, or component , is a substance or chemical constituent that is of interest in an analytical procedure. Grammatically, it is important to note that experiments always seek to measure properties of analytes—and that analytes themselves can never be measured. For instance, one cannot...
to the electrode surface. This technique was made popular through the work of the Russian electrochemist, Benjamin Levich. This technique is useful for studying the kinetics
Chemical kinetics
Chemical kinetics, also known as reaction kinetics, is the study of rates of chemical processes. Chemical kinetics includes investigations of how different experimental conditions can influence the speed of a chemical reaction and yield information about the reaction's mechanism and transition...
and electrochemical reaction mechanism
Electrochemical reaction mechanism
In chemistry, an electrochemical reaction mechanism is the step by step sequence of elementary steps, involving at least one outer sphere electron transfer, by which an overall chemical change occurs .- Overview :...
for a half reaction. This technique is part of a larger class of electroanalytical methods known as hydrodynamic voltammetry (see also hydrodynamics).