]> 2026-05-20T11:28:44+02:00 DirectCoulometryAtControlledPotential 14 en Coulometry at a preselected constant potential of the working electrode. DirectCoulometryAtControlledPotential 39536efc-22a6-4f39-b0c2-e8b845a36278 DirectCoulometryAtControlledPotential 2023-04-21T06:07:06Z 2460055.7549306 OSW39536efc22a64f39b0c2e8b845a36278 14 en OSW39536efc22a64f39b0c2e8b845a36278#DirectCoulometryAtControlledPotential;en DirectCoulometryAtControlledPotential 14 200 1 plainlist 2 [[HasObject::Category:OSW39536efc22a64f39b0c2e8b845a36278]] OSW39536efc22a64f39b0c2e8b845a36278# QUERY52aa0ed7397b8b8ea397f57db3362efd 14 [2,"smw-datavalue-wikipage-property-invalid-title","HasComment","Direct coulometry at controlled potential is usually carried out in convective mass trans- fer mode using a large surface working electrode. Reference and auxiliary electrodes are placed in separate compartments. The total electric charge is obtained by integration of the I\u2013t curve or can be measured directly using a coulometer.@en"] [2,"smw-datavalue-wikipage-property-invalid-title","HasComment","In principle, the end point at which I = 0, i.e. when the concentration of species under study becomes zero, can be reached only at infinite time. However, in practice, the electrolysis is stopped when the current has decayed to a few percent of the initial value and the charge passed at infinite time is calculated from a plot of charge Q(t) against time t. For a simple system under diffusion control Qt= Q\u221e[1 \u2212 exp(\u2212DAt\/V\u03b4)], where Q\u221e = limt\u2192\u221eQ(t) is the total\ncharge passed at infinite time, D is the diffusion coefficient of the electroactive species, A the electrode area, \u03b4 the diffusion layer thickness, and V the volume of the solution.@en"] OSW39536efc22a64f39b0c2e8b845a36278# ERR0cf8c53d7c740a4d5c6eafb6f7e19495