Current and potential distribution in electrolytic cells and Kinetic measurements of the electrolytic formation of argentous and argentic oxides in potassium hydroxide
Current and potential distribution in electrolyte cells. A cell has been built which has two Luggin capillaries mounted on micrometer drives so that the current and potential distribution around a working electrode can be measured. The current and potential distributions for a variety of electrode geometries have been measured. Experiments have been performed which show the effect of electrode geometry, current density and electrolyte conductivity on the current and potential distribution. Experimentally measured current distributions are compared with those calculated from existing theory.^8 Kinetic measurements of the electrolytic formation of argentous oxides in potassium hydroxide. Cyclic current step measurements during the Ag-Ag_2O oxidation plateau have been made. The results of measurements are very similar to those obtained from systems (Ag-Ag(NH_3)_2^+, (Fe^+2-Fe^+3) where the concentration of the electroactive species is diffusion controlled. The exchange current density, i_0, calculated from the relationship developed by Wijnen and Smit^49 decreased from 1.44 ma/cm^2 to 0.75 ma/cm^2 along the Ag-Ag_2O plateau. The changes in the ohmic resistance of the silver oxide film formed in 0.0543, 0.109, 1.09, 5.43, and 10.9 F KOH have been measured. The maximum resistance of the oxide measured in these electrolytes was 0.31, 0.28, 2.44, 5.15, and 0.16ohm-cm^2. Evidence for a proposed explanation of the changes which occurs in the oxide film resistance is presented.
College and Department
Chemistry and Biochemistry
BYU ScholarsArchive Citation
Wright, Craig N., "Current and potential distribution in electrolytic cells and Kinetic measurements of the electrolytic formation of argentous and argentic oxides in potassium hydroxide" (1969). Theses and Dissertations. 8501.
Electric batteris, Silver oxide, Argentic oxide, Electrolytes