A new mode of electrolysis for voltammetry

✍ Scribed by M. Ichise; Y. Nagayanagi; T. Kojima

• Publisher: Elsevier Science
• Year: 1972
• Weight: 219 KB
• Volume: 38
• Category: Article
• ISSN: 0022-0728
• DOI: 10.1016/s0022-0728(72)80358-9

✦ Synopsis

In various types of voltammetry where depolarizers are transferred solely by diffusion, a mode of electrolysis can be considered as a boundary condition of a diffusion equation. Usually, boundary conditions of diffusion equations are classified into three types :

(i) In the first (Dirichlet type), the concentration at the interface is given.

(ii) In the second (Neumann type), the flux at the interface is given.

(iii) In the third type, a relationship between the concentration and the flux at the interface is given.

The boundary condition of the first type corresponds to a mode of controlled potential when the charge transfer reaction is reversible, while the second corresponds to a mode of controlled current. When the charge transfer is irreversible, the current density is expressed as: