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首页> 外文期刊>International Journal of Electrochemical Science >Probing the oscillating Belousov-Zhabotinskii reaction with micrometer-sized electrodes: the effect of C, Pt, and Au
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Probing the oscillating Belousov-Zhabotinskii reaction with micrometer-sized electrodes: the effect of C, Pt, and Au

机译：用微米级电极探测振荡的Belousov-Zhabotinskii反应：C，Pt和Au的影响

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摘要

The Belousov-Zhabotinskii (BZ) oscillating reaction mixture (malonic acid, bromate, and cerium ionsin a strongly acidic medium) was studied. The oxidation state of the Ce +4 /Ce +3 catalyst fluctuates anddrives the open-circuit potential (OCP) of the solution. Oscillatory profiles were analyzed using Au, Ptand C micro- and macro-electrodes to study the stages of induction, oscillating, and equilibrium. Theoscillating behavior of the BZ system is transient, reaching a non-oscillating reductive steady-state. Thetime for achieving the oscillating state depends on the substrate (electrode material and size) while thenumber of oscillations is independent of substrate. Fast Fourier transform (FFT) analysis yields thefundamental frequency of the oscillating profile and evaluates the exponential falloff as the systemapproaches equilibrium. Also, Ce +4 concentration was tracked in the UV Vis. Chemical oscillations ofthe catalyst Ce +4 ion were reproduced using a numerical model, and its dynamical profile was analogousto the experimental data.
机译：研究了Belousov-Zhabotinskii（BZ）振荡反应混合物（强酸性介质中的丙二酸，溴酸根和铈离子）。 Ce +4 / Ce +3催化剂的氧化态会波动并驱动溶液的开路电势（OCP）。使用金，铂和碳微电极和大电极分析了振荡曲线，以研究诱导，振荡和平衡的阶段。 BZ系统的振荡行为是瞬态的，达到非振荡的还原稳态。达到振荡状态的时间取决于基板（电极材料和尺寸），而振荡次数与基板无关。快速傅立叶变换（FFT）分析得出了振荡曲线的基本频率，并随着系统趋于平衡而评估了指数衰减。同样，在紫外可见光下追踪到Ce +4的浓度。使用数值模型再现了催化剂Ce +4离子的化学振荡，其动力学曲线与实验数据相似。

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