O/W microemulsion as electrolyte for electro-polymerization of 3,4-ethylenedioxyselenophene

Zhang, Wenna; Zhang, Wenwen; Liu, Hongtao; Jian, Nannan; Qu, Kai; Chen, Shuai; Xu, Jingkun

doi:10.1016/j.jelechem.2018.02.006

Cited by 20 publications

(10 citation statements)

References 33 publications

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“…Our approach entails the use of the nonionic surfactant Tween 20 to form microemulsions between water and toluene. Microemulsions are nanoscale (1–100 nm) dispersions of water and oil stabilized by surfactants and cosurfactants and are thermodynamically stable, unlike other types of emulsions. , Microemulsions have a complex phase behavior with distinct regions of composition that form stable nanodroplets of surfactant-encapsulated oil dispersed in an aqueous phase or bicontinuous microemulsions consisting of polar and nonpolar nanochannels separated by surfactant monolayers. , …”

Section: Introductionmentioning

confidence: 99%

“…Microemulsions are widely used in a large array of chemical and biochemical systems including a class of polymer synthesis reactions and food and drug formulations. , In addition to possible uses for microemulsions in various synthetic electrochemical processes, microemulsions are of interest in electrochemical reactors since the electrochemistry in such a surfactant-separated system is, broadly speaking, similar to electron transfer processes in biological systems such as biomembranes and, at the more local level, enzymes (mixed polar/nonpolar zones). − Providing for ionic conduction in a separate subphase from that containing the electroactive moiety could lead to broader options for electrochemical reactions.…”

Section: Introductionmentioning

confidence: 99%

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Electron Transfer in Microemulsion-Based Electrolytes

Peng

Cantillo

Nelms

et al. 2020

ACS Appl. Mater. Interfaces

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The use of flowing electrochemical reactors, for example, in redox flow batteries and in various electrosynthesis processes, is increasing. This technology has the potential to be of central significance in the increased deployment of renewable electricity for carbon-neutral processes. A key element of optimizing efficiency of electrochemical reactors is the combination of high solution conductivity and reagent solubility. Here, we show a substantial rate of charge transfer for an electrochemical reaction occurring in a microemulsion containing electroactive material is loaded inside the nonpolar (toluene) subphase of the microemulsion. The measured rate constant translates to an exchange current density comparable to that in redox flow batteries. The rate could be controlled by the surfactant, which maintains partitioning of reactants and products by forming an interfacial region with ions in the aqueous phase in close proximity. The hypothesized mechanism is evocative of membrane-bound enzymatic reactions. Achieving sufficient rates of electrochemical reaction is the product of an effort designed to establish a reaction condition that meets the requirements of electrochemical reactors using microemulsions to realize a separation of conducting and reactive elements of the solution, opening a door to the broad use of microemulsions to effect controlled electrochemical reactions as steps in more complex processes.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Electron Transfer in Microemulsion-Based Electrolytes

Peng

Cantillo

Nelms

et al. 2020

ACS Appl. Mater. Interfaces

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“…This is of utmost relevance for the recently emerging field of MEs for bulk electro-chemical processes which are not limited to ORFBs, but rather include high-voltage supercapacitors [? ] , organic electro-synthesis [19,20] , electro-polymerisation [21] and bio-sensors (simultaneous detection of differently polar analytes [22] ).…”

Section: Homogeneous Chemical Reactions Coupled To the Charge Transfe...mentioning

confidence: 99%

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

Tichter¹,

Borah²,

Nann³

2021

Preprint

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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 twostep redox reaction of methyl-viologen which paves the way for a quantitative electrochemical characterization MEs.

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“…In this manner, we gain a conclusive picture of the complex interplay of diffusive mass transfer and electrode kinetics in anisotropic electrolytes which paves the way for a decent evaluation of electrochemical experiments involving MEs. This is of utmost relevance for the recently emerging field of MEs for bulk electro‐chemical processes which are not limited to ORFBs, but rather include high‐voltage supercapacitors, [21] organic electro‐synthesis, [19,20] electro‐polymerisation [22] and bio‐sensors (simultaneous detection of differently polar analytes [23] ).…”

Section: Introductionmentioning

confidence: 99%

A Theoretical Framework for the Electrochemical Characterization of Anisotropic Micro‐Emulsions**

2021

View full text Add to dashboard Cite

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.

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O/W microemulsion as electrolyte for electro-polymerization of 3,4-ethylenedioxyselenophene

Cited by 20 publications

References 33 publications

Electron Transfer in Microemulsion-Based Electrolytes

Electron Transfer in Microemulsion-Based Electrolytes

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

A Theoretical Framework for the Electrochemical Characterization of Anisotropic Micro‐Emulsions**

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