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

Spatiotemporal Pattern Formation in the Oscillatory Electro-Oxidation of Sulfide on a Platinum Disk
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铂盘上硫化物振荡电氧化时空图案的形成

DOI:
10.1021/jp202881h
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发表时间:
2011-06
影响因子:
3.7
通讯作者:
Epstein, Irving R.
Epstein, Irving R.
中科院分区:
化学3区
文献类型:
--
作者:
Zhao, Yuemin;Wang, Shasha;Varela, Hamilton;Gao, Qingyu;Hu, Xuefeng;Yang, Jiaping;Epstein, Irving R.

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利用电化学方法和电荷耦合器件(CCD)摄像机同时研究了铂片上硫化物电催化氧化过程中的时空斑图形成。该系统的特点是不同的振荡区域分布在一个很宽的电位范围。一个额外的串联电阻和一个大的电极面积有利于观察多个区域的动力学不稳定性沿着的电流/电位曲线。工作电极上的时空模式,如前线,脉冲,螺旋,闪烁的眼睛,闪烁的条纹,和交替同步沉积和溶解,观察在不同的操作条件下的串联电阻和扫描速率。
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.
DOI: 10.1016/s0378-4371(03)00480-1
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期刊: Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics
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