The Chemical and Electrical Implications of Charge Transfer at Interfaces

The Chemical and Electrical Implications of Charge Transfer at Interfaces 

It has been stated that electrochemistry itself is divided into two branches, ionics (the physical chemistry of ions in solution) and electrodics (electron transfer at interfaces). In this article we intend to give a summary of central aspects of electron transfer at interfaces which will be helpful to biophysicists and biochemists who want to know something about the electrical properties of biological situations. 

one of the differences between electrochemical and chemical reactions is that, in the first, the overall reaction takes place in a separated 

FIGURE 1. A situation where the excess-charge density on the OHP is smaller in magnitude than the charge on the metal. — q I ohpI- The remaining charge is distributed in the solution. The solvation sheaths of the ions and the water molecules on the electrode are not shown in the diagram. OHP, outer Helmholtz plane. 

FIGURE 2. An electrochemical cell where it is shown that the electron passes through the externally connected wire. 

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