Related Experiment Video
Updated: Apr 7, 2026
08:32
Electrochemical Roughening of Thin-Film Platinum Macro and Microelectrodes
Published on: June 30, 2019
8.4K
Cyclic voltammetry of fast conducting electrocatalytic films
Cyrille Costentin1, Jean-Michel Savéant
1Université Paris Diderot, Sorbonne Paris Cité, Laboratoire d'Electrochimie Moléculaire, Unité Mixte de Recherche Université - CNRS No. 7591, Bâtiment Lavoisier, 15 rue Jean de Bal[combining umlaut]f, 75205 Paris Cedex 13, France. cyrille.costentin@univ-paris-disderot.fr saveant@univ-paris-diderot.fr.
Physical Chemistry Chemical Physics : PCCP
|July 4, 2015
Summary
Cyclic voltammetry helps understand catalytic film kinetics for energy solutions. This study simplifies analysis of fast conducting films by reducing parameters, enabling precise kinetic assessment.
Area of Science:
- Electrochemistry
- Materials Science
- Chemical Kinetics
Background:
- Catalytic films are crucial for energy applications.
- Understanding their reaction kinetics is essential for optimizing performance.
- Fast conducting films present unique kinetic challenges.
Purpose of the Study:
- To analyze the kinetics of fast conducting catalytic films using cyclic voltammetry.
- To simplify the kinetic analysis by reducing the number of critical parameters.
- To provide a framework for precise assessment of rate-limiting factors.
Main Methods:
- Utilizing cyclic voltammetry to study catalytic films.
- Analyzing systems with ohmic or electron hopping conduction.
- Employing dimensionless parameter combinations to simplify analysis.
- Developing a kinetic zone diagram for comprehensive understanding.
Main Results:
- Identified diffusion and catalytic reaction as key rate-limiting factors.
- Reduced the number of critical parameters to a maximum of two.
- Demonstrated that operational parameters (film thickness, scan rate, concentration) reveal kinetic interplay.
- Provided a method for precise assessment of rate-controlling factors.
Conclusions:
- Cyclic voltammetry, combined with kinetic zone diagrams, offers a powerful approach to analyze fast conducting catalytic film kinetics.
- The simplified parameter set allows for a more accessible and precise evaluation of energy-related catalytic systems.
- This methodology aids in optimizing catalytic film performance for contemporary energy challenges.
More Related Videos
Related Concept Videos
01:10Voltammetric Techniques: Cyclic Voltammetry
2.0K
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...
2.0K
01:12Voltammetric Techniques: Linear-Scan (E vs Time)
1.5K
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...
1.5K
01:20Voltammetry: Overview
3.4K
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...
A voltammetric cell uses three electrodes: a working electrode, a reference electrode, and an auxiliary electrode. The redox reactions occur in the working...
3.4K
01:16Voltammograms: Overview
844
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
Shapes of Voltammograms
844
01:17Voltammetric Techniques: Pulse Voltammetry
1.9K
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...
1.9K
01:21Voltammetry: Factors Affecting Measurements
707
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...
707