A Theoretical Framework for the Electrochemical Characterization of Anisotropic Micro-Emulsions**,ChemElectroChem

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A Theoretical Framework for the Electrochemical Characterization of Anisotropic Micro-Emulsions**
ChemElectroChem ( IF 3.5 ) Pub Date : 2021-07-07 , DOI: 10.1002/celc.202100600
Tim Tichter ₁ , Rohan Borah ₂ , Thomas Nann ₃

Affiliation

Micro emulsions (MEs) offer an exceptionally broad spectrum of applications covering sensing, electrosynthesis, supercapacitors and redox-flow batteries. Herein, we develop the theory for a sophisticated electrochemical characterizion of MEs with a spatially and time-invariant anisotropy in the diffusion domain by means of cyclic voltammerty (CV). By introducing spatially dependent diffusion coefficients into Ficks' first law, we derive a modified diffusion equation to simulate any inherent anisotropy of the ME under investigation. Moreover, by formulating an extended second-order homogeneous six-member square scheme for a kinetically controlled two-step two-electron reaction we capture the intricate entanglement of chemical and electrochemical equilibria. Our theoretical concept is finally validated by experimental CV data for the ME based two-step redox reaction of methyl-viologen which paves the way for a quantitative electrochemical characterization MEs.

中文翻译：

各向异性微乳液电化学表征的理论框架**

微乳液 (ME) 提供了极其广泛的应用范围，包括传感、电合成、超级电容器和氧化还原液流电池。在此，我们通过循环伏安 (CV) 开发了在扩散域中具有空间和时间不变各向异性的 ME 的复杂电化学表征理论。通过将空间相关的扩散系数引入 Ficks 第一定律，我们推导出一个修正的扩散方程来模拟所研究的 ME 的任何固有各向异性。此外，通过为动力学控制的两步双电子反应制定扩展的二阶均质六元正方形方案，我们捕获了化学和电化学平衡的复杂纠缠。

更新日期：2021-09-06

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