Electrochemical
Electrochemical is a branch of chemistry that involves the study of chemical reactions in a solution at the interface of an electron conductor (a metal or a semiconductor) and an ionic conductor (the electrolyte), and how they involve electron transfer between the electrode and the electrolyte or species in solution.
Overview[edit | edit source]
The term electrochemical refers to the combination of electrical and chemical phenomena. This field is important for a variety of industries and scientific disciplines. The most common applications of electrochemical processes are in batteries, fuel cells, electroplating, and electrolysis.
Electrochemical Reactions[edit | edit source]
Electrochemical reactions involve the transfer of electrons from one species to another. In a redox reaction, one reactant, the oxidant, removes electrons from another, the reductant. An electrochemical cell can either generate electrical energy from chemical reactions, or use electrical energy to cause chemical reactions. The latter process is known as electrolysis.
Electrochemical Cells[edit | edit source]
An Electrochemical cell consists of two half-cells. Each half-cell consists of an electrode and an electrolyte. The two half-cells may use the same electrolyte, or they may use different electrolytes. The chemical reactions in the cell may involve the electrolyte, the electrodes, or an external substance.
Electrochemical Series[edit | edit source]
The Electrochemical series is a list of elements in the order of their standard electrode potentials (reduction potentials). It is used to predict the direction of redox reactions.
Electrochemical Methods[edit | edit source]
There are several electrochemical methods used in electrochemistry, including potentiometry, coulometry, amperometry, voltammetry, and impedance spectroscopy.
See Also[edit | edit source]
- Electrolysis
- Electroplating
- Fuel cell
- Battery
- Redox reaction
- Electrode
- Electrolyte
- Electrochemical cell
- Electrochemical series
- Potentiometry
- Coulometry
- Amperometry
- Voltammetry
- Impedance spectroscopy
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Contributors: Prab R. Tumpati, MD
