The electrochemical behavior of the iodine-iodide couple was investigated in both basic and neutral acetic acid solutions at a platinum rotating ring-disk electrode. Voltammetric curves were obtained and discussed. Various kinetic parameters were determined and by comparing to theoretical kinetic parameters a probable reaction mechanism was deduced. The mechanism that best fit experimental results is the following I- + S = I(S) + e- I(S) + I- = I2 + S + e (slow). The electrochemical behavior of bromine, bromide, and chloride was also investigated in the same media. Voltammetric curves were recorded and discussed with emphasis on the hysteresis that occurs between anodic and cathodic scans. Surface phenomenon that cause this hysteresis were, in some cases, determined. The involvement of surface oxides and adsorption phenomena in causing the hysteresis were evident. Some kinetic parameters were obtained.
College and Department
Physical and Mathematical Sciences; Chemistry and Biochemistry
BYU ScholarsArchive Citation
Cranney, Donald Harrison, "Voltammetric and electrochemical kinetic studies of the halides and halogens at a platinum rotating ring-disk electrode in anhydrous acetic acid" (1976). Theses and Dissertations. 8192.
Halogens, Halides, Electrodes, Platinum