Electrochemical processes at liquid-liquid interfaces are of key importance in many extraction and phase transfer catalysis processes and measurements of ion transfer across liquid-liquid interfaces has traditionally been a domain of static experimental systems [1]. In this presentation, the use of both stationary and hydrodynamic liquid-liquid interfaces is compared. Voltammetric studies with immobilised droplets and with flowing liquids are reported. For example, two immiscible liquids, N-octylpyrrolidone (with blue dye) and aqueous 0.1 M NaClO₄ are passed through a micro-flow cell with rectangular duct. The resulting flow pattern is dependent on the flow rate and viscosity of each individual phase. Optical micrographs are presented and a plot of flow rate to flow width in the channel flow cell. At the interface of the two flowing liquids a triple phase boundary [2] with the gold electrode is established and electrochemical processes at this dynamic triple phase boundary are monitored. Electrochemically driven anion transfer processes are reported for simple and for more complex anions.

References

[1]  Bonne MJ, Reynolds C, Yates S, Shul G, Niedziolka J, Opallo M, Marken F, New J. Chem. 30 (2006) 327-334.

[2] Banks CE, Davies TJ, Evans RG, Hignett G, Wain AJ, Lawrence NS, Wadhawan JD, Marken F, Compton RG, Phys. Chem. Chem. Phys. 5 (2003) 4053-4069.

• Legal notice:
  

  Copyright (c) Pielaszek Research, all rights reserved.
  The above materials, including auxiliary resources, are subject to Publisher's copyright and the Author(s) intellectual rights. Without limiting Author(s) rights under respective Copyright Transfer Agreement, no part of the above documents may be reproduced without the express written permission of Pielaszek Research, the Publisher. Express permission from the Author(s) is required to use the above materials for academic purposes, such as lectures or scientific presentations.
  In every case, proper references including Author(s) name(s) and URL of this webpage: https://science24.com/paper/12615 must be provided.

1. Impedance Methods in Electrochemistry
2. Redox Reactivity of Methylene Blue in the Pores of UMCM-1 Metal-Organic Frameworks
3. Carbon Nanoparticle Surface Modification for Sensor Development
4. Ion Association Effects in Cellulose – Poly-(Diallyldimethylammonium) Reassembled Membranes Immersed in Acetonitrile
5. Conduction in Nanoparticle Assemblies and Mesoporous Films
6. Positively Charged Surface Functionalised Carbon Nanoparticles as Binding Sites for Redox Active Species
7. Triple Phase Boundary Photo-Voltammetry: Resolving Rhodamine B Reactivity in 4-(3-Phenylpropyl)-Pyridine Microdroplets
8. Carbon Dioxide Sensing Systems Based On Processes At Triple Phase Boundary Interfaces
9. Electrochemical behaviour of carbonised cellulose nanofibril films on the ITO electrode surface
10. MoSe₂ Substrates for the Electrodeposition of CISe Semiconductor Films
11. Silver Nanoparticle Catalysed NO₃^- Reduction Characterised with a Hydrodynamic Generator-Collector SPCE System
12. Determination of Dopamine in Presence of Ascorbate in Ultrathin Carbon Nanoparticle Composite Film Electrodes
13. Driving ion transfer across the toluene (trihexyl(tetradecyl)-phosphonium tris(pentafluoroethyl)trifluoro-phosphate) | water (electrolyte) interface with the MnTPP(III/II) redox system
14. Electrocatalytic Sulphite Detection at a Liquid-Liquid-Solid Three-Phase Boundary Electrode Sensors
15. Electrochemical Processes at Electrodes in Microwave Fields
16. Microwave-assisted Capillary Electrophoresis with Electrochemical Detection
17. Analysis of Chlorobenzenes in Environmental Water Samples using Microwave-Assisted with Ionic-Liquids Liquid-Phase Microextraction
18. Electrochemical reactivity of proteins immobilised in mesoporous titania
19. New electrode surfaces for solid | liquid | liquid triple phase boundary electrochemistry
20. Ion transfer electrodes based on carbon nanofibers embedded in silicate film modified with room temperature ionic liquid
21. Nanoobjects embedded in silicate films for biphasic electrodes
22. Electrochemical Processes in Mesoporous TiO₂ Phytate Films