Artículos de revistas
Spatiotemporal Pattern Formation in the Oscillatory Electro-Oxidation of Sulfide on a Platinum Disk
Fecha
2011Registro en:
JOURNAL OF PHYSICAL CHEMISTRY C, v.115, n.26, p.12965-12971, 2011
1932-7447
10.1021/jp202881h
Autor
ZHAO, Yuemin
WANG, Shasha
VARELA, Hamilton
GAO, Qingyu
HU, Xuefeng
YANG, Jiaping
EPSTEIN, Irving R.
Institución
Resumen
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.