Title: wall-jet electrode
Long Title: IUPAC Gold Book - wall-jet electrode
DOI: 10.1351/goldbook.09125
Status: current

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

Notes
1) The limiting current is given by \[I_{\rm{lim}} = 1.59\ kz Fr^{3/4} d^{-1/2} V_{\rm{f}}^{3/4} \upsilon^{-5/12} D^{2/3} c\] 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 (\(\rm{cm}\)), \(d\) is the diameter of the impinging jet (\(\rm{cm}\)), \(V_{\rm{f}}\) is the volume flow rate (\(\pu{cm3 s-1}\)), \(\nu\) the kinematic viscosity (\(\pu{cm2 s-1}\)), and \(D\) the diffusion coefficient of the electroactive species (\(\pu{cm2 s-1}\)) of concentration \(c\) (\(\pu{mol cm-3}\)).
2) The current is not directly proportional to the electrode area.

Related Terms
- electrode: https://goldbook.iupac.org/terms/view/09060
- electron number of an electrochemical reaction: https://goldbook.iupac.org/terms/view/09063

Source
- PAC, 2020, 92, 641. 'Terminology of Electrochemical Methods of Analysis (IUPAC Recommendations 2019)' on page 668 (https://doi.org/10.1515/pac-2018-0109)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/09125/html
- json: https://goldbook.iupac.org/terms/view/09125/json
- xml: https://goldbook.iupac.org/terms/view/09125/xml

Citation: 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. 10.1351/goldbook.09125
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Accessed: 2026-07-28T14:59:28+00:00