ABSTRACT
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The term electrochemical reactor is a modification of the chemical engineering term, chemical reactor, reflecting the electrochemical process. The theories in electrochemical engineering focus on the mass, heat, and charge transport at the electrodes and the arrangement of devices. We can define electrochemical engineering as the proper arrangement of the anode, cathode, electrolyte, diaphragm, and peripherals in order to produce electrochemical reactions. However, not every device is suitable for an efficient electrochemical reaction. We need to design it well. This means that we have to define the electrochemical and the engineering factors to make it efficient from all points of view. The overall chemical (catalytic) reaction results from at least two electrochemical (electrocatalytic) reactions that occur as a result of the electron transfer at the anode and the cathode either through an external electric power device or through an external motor or load. The reactants in the electroreduction reaction are the electrons, while they are one of the products in the electrooxidation reaction. The circuit is completed by the ions or the charged macromolecules that are transported through the electrolyte.
