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Related Concept Videos

Controlled-Potential Coulometry: Electrolytic Methods01:17

Controlled-Potential Coulometry: Electrolytic Methods

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 ensures...
Potentiometry: Membrane Electrodes01:15

Potentiometry: Membrane Electrodes

Membrane electrodes, also known as p-ion electrodes, use membranes that selectively interact with free analyte ions, generating a potential difference across the membrane. The resulting membrane potential, known as the asymmetry potential, is not zero even when analyte concentrations on both sides of the membrane are equal. The membrane's response is typically not selective to a single analyte but proportional to the concentration of all ions in the sample solution capable of interacting at the...
Electrodeposition01:08

Electrodeposition

Electrodeposition is a technique used to separate an analyte from interferents by electrochemical processes. Here, the analyte is a metal ion that can be deposited on an electrode immersed in the sample solution. The electrochemical setup consists of an anode and a cathode. When an electric current is applied to the setup, oxidation occurs at the anode. At the cathode, which consists of a large metal surface, metal ions undergo reduction and deposit onto the surface.
Electrodeposition can...
Potentiometry: Types of Electrodes01:19

Potentiometry: Types of Electrodes

Reference electrodes serve as a stable reference point for potentiometric measurements, while indicator and working electrodes react to variations in the composition of a solution.
The Standard Hydrogen Electrode (SHE) is a widely used reference electrode that maintains zero potential across all temperatures. However, its need for a continuous hydrogen gas supply renders it impractical for everyday use.
An alternative to SHE is the Saturated Calomel Electrode (SCE). This electrode features an...
Electrodes: Overview01:17

Electrodes: Overview

Electrochemical measurements are conducted in an electrochemical cell composed of various components that control and measure the current and potential. One fundamental component is electrodes, conductive materials that enable electron transfer reactions at their surfaces.
There are two main types of electrodes in electrochemical cells. The first type, known as the working or indicator electrode, has a potential that is sensitive to the analyte's concentration and reacts to changes in the...
Electrogravimetric Analysis: Overview01:30

Electrogravimetric Analysis: Overview

Electrogravimetric analysis measures the weight of an analyte deposited electrolytically onto a suitable working electrode. This method involves applying a potential to a pre-weighed electrode submerged in a solution, which results in the desired substance being deposited through reduction at the cathode or oxidation at the anode. The electrode's weight is recorded after deposition, and the difference in weight gives the analyte's weight in the solution.
To test the completeness of the...

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Related Experiment Video

Updated: Jun 20, 2026

Electrochemical Preparation of Poly(3,4-Ethylenedioxythiophene) Layers on Gold Microelectrodes for Uric Acid-Sensing Applications
10:48

Electrochemical Preparation of Poly(3,4-Ethylenedioxythiophene) Layers on Gold Microelectrodes for Uric Acid-Sensing Applications

Published on: July 28, 2021

Template-directed porous electrodes in electroanalysis.

Alain Walcarius1

  • 1Laboratoire de Chimie Physique et Microbiologie pour l'Environnement, UMR 7564, CNRS-Nancy-University, 405, rue de Vandoeuvre, 54600, Villers-les-Nancy, France. alain.walcarius@lcpme.cnrs-nancy.fr

Analytical and Bioanalytical Chemistry
|September 4, 2009
PubMed
Summary

Structuring electrode surfaces at the nano- and macroscale enhances electrochemical device performance. Template technology enables the design of advanced porous electrodes for analytical chemistry applications, including sensors and biosensors.

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Area of Science:

  • Electrochemistry
  • Materials Science
  • Analytical Chemistry

Background:

  • Electrode surface structuring is crucial for improving electrochemical device performance.
  • Methods include nano- and/or macrostructuring to enhance molecular accessibility and mass transport.
  • Increased electroactive surface area and reagent confinement are key benefits.

Purpose of the Study:

  • To highlight the advantages of template technology in designing porous electrodes.
  • To discuss the application of these electrodes in analytical chemistry.
  • To review recent literature examples of electrochemical sensors and biosensors.

Main Methods:

  • Overview of template technology for electrode fabrication.
  • Focus on thin-film electrodes, functionalized or not.
  • Literature review of recent applications.

Main Results:

  • Template technology facilitates the design of novel porous electrodes.
  • These electrodes offer enhanced performance characteristics.
  • Applications in electrochemical sensors and biosensors are demonstrated.

Conclusions:

  • Template-assisted design is a powerful approach for advanced electrode materials.
  • Porous electrodes show significant promise in analytical chemistry.
  • Further development can lead to improved electrochemical sensing platforms.