- Title
- A theoretical rramework for the electrochemical characterization of anisotropic micro-emulsions
- Creator
- Tichter, Tim; Borah, Rohan; Nann, Thomas
- Relation
- ChemElectroChem Vol. 8, Issue 17, p. 3397-3409
- Publisher Link
- http://dx.doi.org/10.1002/celc.202100600
- Publisher
- Wiley-Blackwell
- Resource Type
- journal article
- Date
- 2021
- Description
- 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.
- Subject
- micro-emulsions; redox-flow batteries; two-electron transfer; methyl-viologen; EkEk-mechanism
- Identifier
- http://hdl.handle.net/1959.13/1436752
- Identifier
- uon:40125
- Identifier
- ISSN:2196-0216
- Language
- eng
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