Figure 3.

Deposition during cycle voltammetry on the 12 mm diameter RDE is non-uniform. Cycling between −0.4 V and −0.82 V (SSE) results in the development of Turing patterns as the electrode bifurcates into passive (bright) and active (dark) regions. The dark regions correspond to the growth of deposits that preferentially initiate at deeper abrasion on the electrode surface and then develop a hemicylindrical or hemispherical growth front. The Turing patterns are significantly affected by fluid flow as indicated in the respective images a.) 25 rpm, b.) 100 rpm and c.) 400 rpm. The high magnification image in (c.) is from a different experiment than the low magnification image, both conducted under the stated conditions.