Capillary-assisted bipolar electrochemistry: A focused mini review
Laurent Bouffier1,2,3, Neso Sojic1,2,3, Alexander Kuhn1,2,3
1University of Bordeaux, ISM, UMR 5255, Talence, France.
Electrophoresis
|March 18, 2017
Summary
Bipolar electrochemistry utilizes a single electrode as both anode and cathode, enabling wireless control. This review explores applications of this technique, particularly in capillary-based setups from macro to microscale.
Area of Science:
- Electrochemistry
- Materials Science
- Analytical Chemistry
Background:
- Classic electrochemistry uses separate anode and cathode for electron transfer.
- Bipolar electrodes uniquely function as both anode and cathode simultaneously.
- This allows for wireless electrochemical addressing via a polarization potential.
Purpose of the Study:
- To review specific applications of bipolar electrochemistry.
- Focus on experiments utilizing handmade electrochemical cells, such as tubes and capillaries.
- Explore applications across macroscale and microscale experimental setups.
Main Methods:
- Review of existing literature on bipolar electrochemistry.
- Analysis of experimental setups using tubes and capillaries.
- Examination of applications from macroscale to microscale.
Main Results:
- Bipolar electrochemistry offers remarkable potential in various scientific fields.
- Handmade cells, particularly capillaries, are frequently used for practical reasons.
- The scale of the experiment (macro vs. micro) influences the role of the capillary.
Conclusions:
- Bipolar electrochemistry presents a unique and versatile approach to electrochemical studies.
- The use of capillary-based setups is common and effective.
- Further exploration of its potential in materials science and analytical chemistry is warranted.
Related Concept Videos
Controlled-Potential Coulometry: Electrolytic Methods
795
Controlled-potential coulometry, also known as potentiostatic coulometry, employs a three-electrode system in which the working electrode's potential is precisely regulated using a potentiostat. Platinum working electrodes are utilized for positive potentials, while mercury pool electrodes are favored for extremely negative potentials. The platinum counter electrode is separated from the analyte using a membrane or salt bridge to avoid interference in the analysis.
The chosen potential...
The chosen potential...
795
Interfacial Electrochemical Methods: Overview
1.0K
Interfacial electrochemical methods focus on the phenomena occurring at the boundary between an electrode and a solution, as opposed to bulk methods that concentrate on the solution's overall properties. These interfacial methods are classified as either static or dynamic based on the presence of a nonzero current in the electrochemical cell and the consistency of analyte concentrations. Static methods, such as potentiometry, measure the cell's potential without any significant current...
1.0K
Controlled-Current Coulometry: Overview
782
Controlled current coulometry, also known as amperostatic coulometry, is a technique used in electrochemical analysis to measure the quantity of a substance through the controlled passage of current. It involves the application of a constant current to an electrochemical cell containing the analyte of interest. As the current flows through the cell, the analyte undergoes a redox reaction at the electrode surface, resulting in a charge transfer. By monitoring the time required for a certain...
782
Capillary Electrophoresis: Instrumentation
1.4K
Capillary electrophoresis instrumentation typically consists of several key components. A high-voltage power supply generates the electric field necessary for the separation by connecting to an anode (the positively charged electrode) and a cathode (the negatively charged electrode) located in buffer reservoirs at each end of the capillary tube. The system includes a sample vial, a fused silica capillary tube coated with polyimide for mechanical strength through which the sample components...
1.4K
Voltammetric Techniques: Linear-Scan (E vs Time)
1.4K
Polarography is a classical voltammetric technique used to analyze electrochemical reactions. This method applies a linear potential sweep to a dropping mercury electrode (DME), and the resulting current is measured. A dropping mercury electrode is commonly used as the working electrode in polarography. It consists of a capillary tube filled with mercury, where the tiny droplet forms at the tip. This droplet continuously drops from the capillary, creating a new electrode surface for each...
1.4K
Capillary Electrophoresis: Applications
1.6K
Capillary electrophoretic separations offer various modes, each with unique applications. These modes include capillary zone electrophoresis, capillary gel electrophoresis, capillary array electrophoresis, capillary isoelectric focusing, capillary isotachophoresis, micellar electrokinetic chromatography, and capillary electrochromatography.
Capillary zone electrophoresis (CZE) separates ionic components based on their electrophoretic mobility. It has been used to separate proteins, amino acids,...
Capillary zone electrophoresis (CZE) separates ionic components based on their electrophoretic mobility. It has been used to separate proteins, amino acids,...
1.6K


