Anode

the anode is the electrode where takes place an electrochemical reaction of Oxydation (driving with the production of electrons) in opposition to the Cathode where an electrochemical reaction of Réduction occurs (driving with the consumption of electrons).

  • It acts of the negative pole (-) in a Battery which outputs.
  • On the other hand, in the case of a electrolyser, the anode is connected to the positive pole of the external generator.
  • In the case of the production of aluminum, an anode is also called together anodic. See the following site:
  • It is also a device used to protect a metal structure (ship hull,…) Corrosion. See the article Cathodic protection.

Etymology

This term was created in 1834 starting from the Greek ἄνοδος ( anodos càd rise) by William Whewell with which Michael Faraday had required some new names necessary to publish one of its work on the electrolysis, process recently discovered. In this publication, Faraday explains why when an electrolytic cell is directed so that the electric current crosses “body which breaks up” (electrolyte) Is towards the West, or, to relieve the memory, in the way in which the sun seems to move, the anode is that by which the current enters the electrolyte, of the east coast: “ano to the top , odos a way ; the way in which the sun rises” (, republication: ).

The use of the East to describe the entering way (more precisely which enters → Is → the sun which rises → to the top ) can seem artificial. Previously, Faraday had used the word “eisode”, more transparency (the door by which the current between). It chooses to use “the electrode of the East” (of other candidations: “eastode”, “oriode”, “anatolode”) to immunize its definition with a possible later change of the conventional direction of the Electric current, whose true nature was not known at the time. The reference which it used was thus the direction of the terrestrial magnetic field which one at the time held for immutable.

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