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Related Concept Videos

Voltammetric Techniques: Cyclic Voltammetry01:10

Voltammetric Techniques: Cyclic Voltammetry

834
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...
834
Voltammetry: Overview01:20

Voltammetry: Overview

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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...
2.2K
Voltammetry: Stripping Methods01:13

Voltammetry: Stripping Methods

418
Anodic Stripping Voltammetry (ASV), Cathodic Stripping Voltammetry (CSV), and Adsorptive Stripping Voltammetry (AdSV) are electrochemical techniques used to determine trace amounts of analytes in solution. These methods involve applying a potential to an electrode and measuring the resulting current.
Anodic Stripping Voltammetry (ASV)
ASV is used to determine metals and metalloids at trace levels. It involves two steps: deposition and stripping. First, a negative potential is applied to the...
418
Controlled-Potential Coulometry: Electrolytic Methods01:17

Controlled-Potential Coulometry: Electrolytic Methods

355
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...
355
Electrogravimetric Analysis: Overview01:30

Electrogravimetric Analysis: Overview

426
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...
426
Voltammetry: Factors Affecting Measurements01:21

Voltammetry: Factors Affecting Measurements

236
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...
236

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Related Experiment Video

Updated: Oct 22, 2025

Electrochemical Roughening of Thin-Film Platinum Macro and Microelectrodes
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Prudent Practices in ex situ Durability Analysis Using Cyclic Voltammetry for Platinum-based Electrocatalysts.

Khantesh Agrawal1, Adarsh Ajith Naik1, Saroj Chaudhary2

  • 1Department of Chemical Engineering, Indian Insitute of Sicence (IISc) Bangalore, Near CV Raman Avenue, Bangalore, Karnataka, 560012, India.

Chemistry, an Asian Journal
|August 30, 2021
PubMed
Summary

This study provides clear guidelines for using cyclic voltammetry (CV) to assess electrocatalyst performance, specifically for platinum (Pt) fuel cell catalysts. It simplifies the process for researchers without formal electrochemistry training, ensuring reliable electrochemical surface area (ECSA) measurements.

Keywords:
Cyclic voltammetryDurability testElectrochemical Surface Area (ECSA)Fuel cell vehiclesPt-based electrocatalyst

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Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance
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Area of Science:

  • Materials Science
  • Electrochemistry
  • Catalysis

Background:

  • Platinum (Pt)-based electrocatalysts are crucial for fuel cell vehicles but require accurate activity and durability assessments.
  • Characterizing electrocatalyst performance using cyclic voltammetry (CV) presents a steep learning curve for non-electrochemists.
  • Reliable assessment of electrochemical surface area (ECSA) is vital for advancing fuel cell technology.

Purpose of the Study:

  • To provide a clear, step-by-step guide for reliable ex situ characterization of electrocatalyst activity and durability using CV.
  • To demystify CV data acquisition and electrochemical surface area (ECSA) computation for researchers new to electrochemistry.
  • To offer practical safeguards for achieving repeatable results in long-term durability testing of platinum (Pt) electrocatalysts.

Main Methods:

  • Compilation of prudent practices for cyclic voltammetry (CV) data acquisition.
  • Explanation of typical cyclic voltammetry (CV) features for reversible redox couples.
  • Demonstration using nanoscale catalytic films formed by self-terminating electrodeposition of Pt.

Main Results:

  • A conceptual framework for understanding cyclic voltammetry (CV) data.
  • Specific guidance on computing electrochemical surface area (ECSA) from platinum (Pt) cyclic voltammetry (CV).
  • Identification of safeguards to prevent errors and ensure reproducibility in durability tests.

Conclusions:

  • This work simplifies the complex process of electrocatalyst characterization for a broader research audience.
  • Adherence to the outlined practices ensures reliable electrochemical surface area (ECSA) measurements and durability assessments.
  • The guidelines facilitate the large-scale adoption of fuel cell vehicles by improving electrocatalyst research methodologies.