Reactions and morphology of silver electrodes oxidized in alkaline solutions and oxidation of model-pore electrodes
Wire, foil, and sintered silver electrodes were oxidized potentiostatically and galvanostatically in aklaline solutions. The experimental data reported here strongly support the dissolution-precipitation mechanism for Ag_2O formation. Many of the oxidized electrodes were examined using a scanning electron microscope. The Ag_2O occurs as a close array of small (4,000 A) mounds rather than a uniformly thick film. The number of mounds on a surface increases, and their average size decreases, with increasing potential or current density. Model-pore electrodes were constructed and oxidized to determine the influence of the environment of a pore on the mode of oxidation. The iR drop into the pore is the most significant experimental factor. Because of it, the extent of oxide penetration into the pore decreases with decreasing pore size.
College and Department
Chemistry and Biochemistry
BYU ScholarsArchive Citation
Steed, Seymour Paul, "Reactions and morphology of silver electrodes oxidized in alkaline solutions and oxidation of model-pore electrodes" (1972). Theses and Dissertations. 8359.