Simultaneous determination of the diffusion coefficient of the depolarizer and the number of electrons involved in processes at hemispherical platinum electrodes

Reagentless and calibrationless silicate measurement in oceanic waters

“…A direct determination of concentration has been proposed by electrical charge measurement but demanding a rigorous sample preparation [19,20]. Original methods for simultaneous determination are the use of two methods [21][22][23], measurements on electrodes with different forms [24,25]-planar or cylindrical [26], the use of one electrode on different timescales [27][28][29][30][31][32].…”

Direct determination of diffusion coefficient for borohydride anions in alkaline solutions using chronoamperometry with spherical Au electrodes

“…There have been a number of papers concerning electrochemical determination of diffusion coefficient [6][7][8][9][10]. Because in the relevant equations the diffusion coefficient is always grouped with the concentration (c) of the diffusing species and the number of electrons participating in the electrode reaction (n), in traditional ways of D determination the values of c and n must be known in advance.…”

“…In the early of 1970, Biondi and Bellugi [9] reported the determination of diffusion coefficient using chronoamperometry with a hemisphere Pt electrode. Compared with microdisk electrodes, the spherical electrodes have the advantage that the diffusion equation is exact and applicable to the entire period of the diffusion controlled process.…”

Diffusion-controlled current at the stationary finite disk electrode Theory

“…This is in contrast to hanging mercury drop electrodes or shielded planar electrodes. The other fascinating point is that for proper dimensions and times such electrodes make it possible to determine n and D simultaneously from a single chronoamperogram [9,10,28,29].…”