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Voltammetric Techniques: Cyclic Voltammetry

Voltammetric Techniques: Cyclic Voltammetry

Cyclic voltammetry (CV) is an electrochemical technique used to investigate the redox properties of a chemical species. It involves measuring the current response of an electrochemical cell as a function of the applied potential. The setup for cyclic voltammetry typically consists of a working electrode, a reference electrode, and a counter electrode—all immersed in an electrolyte solution. The working electrode is where the redox reaction of interest occurs, while the reference electrode...

Voltammetry: Overview

Voltammetry: Overview

Voltammetry is an electroanalytical technique in which the current flowing through an electrochemical cell is measured as a function of applied potential, typically under conditions of concentration polarization. The technique provides valuable information about redox-active species, and the current response is plotted as a voltammogram.
A voltammetric cell uses three electrodes: a working electrode, a reference electrode, and an auxiliary electrode. The redox reactions occur in the working...

Voltammograms: Overview

Voltammograms: Overview

Voltammograms are current plots as a function of applied potential, offering insights into electrochemical systems. The shape of a voltammogram depends on how the current is measured and whether convection (heat transfer by fluid movement) is present or absent.
Shapes of Voltammograms

Voltammetric Techniques: Linear-Scan (E vs Time)

Voltammetric Techniques: Linear-Scan (E vs Time)

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...

Voltammetric Techniques: Pulse Voltammetry

Voltammetric Techniques: Pulse Voltammetry

Differential-pulse voltammetry (DPV) is a type of voltammetry that involves applying a series of voltage pulses to an electrochemical cell while measuring the resulting current. In DPV, the differential pulse or small potential pulses are superimposed on a linear potential sweep. The magnitude of these pulses is typically small, often in the millivolt range. Each voltage pulse lasts a short duration, usually in the order of a few milliseconds, and is applied at regular intervals along the...

Voltammetry: Factors Affecting Measurements

Voltammetry: Factors Affecting Measurements

A current produced due to the redox reactions of the analyte at the working and auxiliary electrodes is called a faradaic current. The reaction can be divided into two types. The current generated due to the reduction of the analyte is called cathodic current, and it carries a positive charge. In contrast, the current produced by analyte oxidation is known as an anodic current, and it has a negative charge. The applied potential at the working electrode determines the faradaic current flow, and...

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Related Experiment Video

Updated: May 10, 2026

Using Cyclic Voltammetry, UV-Vis-NIR, and EPR Spectroelectrochemistry to Analyze Organic Compounds

Using Cyclic Voltammetry, UV-Vis-NIR, and EPR Spectroelectrochemistry to Analyze Organic Compounds

Published on: October 18, 2018

Voltammetry as a tool for characterization of CdTe quantum dots.

Pavlina Sobrova¹, Marketa Ryvolova, Jaromir Hubalek

¹Department of Chemistry and Biochemistry, Faculty of Agronomy, Mendel University in Brno, Zemedelska 1, CZ-613 00 Brno, Czech Republic. hubalek@feec.vutbr.cz.

International Journal of Molecular Sciences

|June 29, 2013

Summary

This study characterizes Cadmium Telluride (CdTe) quantum dots (QDs) using voltammetry, establishing a new method for QD stability assessment and quantification with a low detection limit.

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Magnetometric Characterization of Intermediates in the Solid-State Electrochemistry of Redox-Active Metal-Organic Frameworks

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Published on: June 9, 2023

Area of Science:

Electrochemistry
Nanotechnology
Materials Science

Background:

Electrochemical detection of quantum dots (QDs) is widely applied.
Characterization and quantification of QDs using voltammetry remain underexplored.

Purpose of the Study:

To characterize Cadmium Telluride (CdTe) QDs using electrochemical techniques.
To develop a novel method for QD stability testing and quantification.

Main Methods:

Cyclic voltammetry
Differential pulse voltammetry
Electrochemical characterization of CdTe QDs

Main Results:

Voltammetric peaks for CdTe QDs were identified.
A detection limit of 100 fg/mL (3 S/N) was achieved.
The developed method demonstrated effectiveness in assessing QD stability.

Conclusions:

Voltammetry provides a robust method for CdTe QD characterization and quantification.
The new approach enables reliable stability studies for QDs.
This work advances electrochemical methods for nanomaterial analysis.