We employed cyclic voltammetry to monitor iodine desorption from a platinum electrode, and the uptake of iodine on an iodine-free platinum surface made available through a dedicated cell geometry and electrode immersion procedures. Within the experimental setting, iodine adsorption takes place either on the bottom half of the same working electrode or on a second, indicator electrode. The rate of iodine desorption is electrode potential dependent and is much higher when desorption occurs from the half I-covered vs. the fully I-covered working electrode. We exclude the possibility of long-range diffusion of iodine on platinum to account for the data, and conclude that 2D diffusion may contribute to the accelerated desorption process by allowing iodine to decompress before it leaves the surface to solution.