IUPAC - wall-jet electrode (09125)

wall-jet electrode

https://doi.org/10.1351/goldbook.09125

A disc electrode with a thin circular jet of fluid impinging on its centre.

Notes:

The limiting current is given by $I_{l i m} = 1.59 k z F r^{3 / 4} d^{- 1 / 2} V_{f}^{3 / 4} υ^{- 5 / 12} D^{2 / 3} c$ where 1.59 is a numerical factor that arises from the mathematical solution to the convective-diffusion system, $k$ is an empirical factor with values between 0.90 and 0.96, $z$ the electron number of an electrochemical reaction, and $F$ the Faraday constant, $r$ is the radius of the disc electrode ( $c m$ ), $d$ is the diameter of the impinging jet ( $c m$ ), $V_{f}$ is the volume flow rate ( ${cm}^{3} s^{- 1}$ ), $ν$ the kinematic viscosity ( ${cm}^{2} s^{- 1}$ ), and $D$ the diffusion coefficient of the electroactive species ( ${cm}^{2} s^{- 1}$ ) of concentration $c$ ( $mol {cm}^{- 3}$ ).
The current is not directly proportional to the electrode area.

Source:
PAC, 2020, 92, 641. (Terminology of Electrochemical Methods of Analysis (IUPAC Recommendations 2019)) on page 668 [Terms] [Paper]

Citation: 'wall-jet electrode' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.09125 RIS BibTex EndNote

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wall-jet electrode