Spatiotemporal Pattern Formation in the Oscillatory Electro-Oxidation of Sulfide on a Platinum Disk

Spatiotemporal pattern formation in the electrocatalytic oxidation of sulfide on a platinum disk is investigated using electrochemical methods and a charge-coupled device (CCD) camera simultaneously. The system is characterized by different oscillatory regions spread over a wide potential range. An additional series resistor and a large electrode area facilitate observation of multiple regions of kinetic instabilities along the current/potential curve. Spatiotemporal patterns on the working electrode, such as fronts, pulses, spirals, twinkling eyes, labyrinthine stripes, and alternating synchronized deposition and dissolution, are observed at different operating conditions of series resistance and sweep rate.

National Natural Science Foundation of China

National Natural Science Foundation of China[21073232]

National Natural Science Foundation of China

National Natural Science Foundation of China[50921002]

Chinese Central University

Chinese Central University[2010LKHX02]

Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP)[09/07629-6]

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

National Science Foundation (NSF)

National Science Foundation (NSF)[CHE-0615507]

Radcliffe Institute for Advanced Study

Radcliffe Institute for Advanced Study