electrode potentials


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electrode potentials:

see electrochemistryelectrochemistry,
science dealing with the relationship between electricity and chemical changes. Of principal interest are the reactions that take place between electrodes and the electrolytes in electric and electrolytic cells (see electrolysis), as well as the reactions that
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(1) In acid solution, the electrode potential increases with rising pH, in the same way that is known of the hydrogen oxidation at a hydrogen electrode.
Input quantities for numerical modelling of the field are the same as in electrostatic approach [17]: [h.sub.1] = 10.0 mm, [h.sub.2]= 40.0 mm, [r.sub.0] = 0.025 mm, distance from the edge of plane electrodes to the x axis l = 200 mm, electrode potentials [u.sub.1] = -10000 V, [u.sub.2] = 0, [u.sub.3] = -5000 V.
Images like these can be used routinely not only for the optimization of the electrolyte composition, but also for the optimization of other parameters such as temperature and the current density or the electrode potential.
To understand this observation better, the individual electrode potentials were also measured (Figure 4(b)).
In this work, we observed that the alkaline anode/acidic cathode acid-alkaline media configuration leads to a very high measured OCP of 1.81 V, while other combinations will result in very low OCPs as a result of the pH dependence of standard electrode potentials. The MLSPBFC operated in the alkaline anode/acidic cathode acid-alkaline media configuration; the measured OCP of 1.81 V is in good agreement with the theoretical OCP of 2.95 V.
The ratios Red:Ox determined by spectrometry and chronocoulometry as a function of electrode potentials were indistinguishable [8].
The main boundary conditions needed for the solution of corona field equations are the values of electrode potentials, the field strength [E.sub.0] on the surface of the wire corresponding to corona onset voltage [U.sub.0], and the space charge density [rho] on the surface of the wire.
Among these are the mechanism of current flow in electrolyte solutions, the nature of electrode potentials, and the values of the transport numbers in diffusion layers.