Traveling wave on a phase-segregated metal composite caused by electrochemical reaction: Direct monitoring for silver-wave

Here, spatiotemporal pattern formation on the electrode surface in an electrochemical system was studied. We performed an experiment for dynamic pattern formation accompanied by Ag and Sb co-electrodeposition through real-time visual inspection, together with in situ elemental analysis. The time evolution of the Ag-rich domain as a chemical wave was successfully monitored using x-ray visualization. The results indicate that the occurrence of a traveling wave is caused by phase segregation between Ag and Sb under a constant electric current.