How to solve crossover issue during cyclic Voltammetry?

  • Thread starter mesut yurkcu
  • Start date
  • Tags
    Cyclic
In summary, to solve crossover issues during cyclic voltammetry, it is important to check and clean the electrode connections and adjust instrument settings as needed.
  • #1
mesut yurkcu
Gold Member
1
1
How to solve crossover issue during cyclic Voltammetry?
We are using Electrochemical Test instrument to get CV, RDE results. When we start CV or RDE test, we are having crossover issue instead of nice results. We test nearly all possibilities including pure Pt plate, thin film samples, nanorods samples, and etc. All of them gave crossover issue.

Anyone has this kind of issue and if yes, how did you solve it?

Thanks
 
Chemistry news on Phys.org
  • #2
The most likely cause of crossover issues during cyclic voltammetry is a poor electrical connection between the electrode and the cell. This can be caused by a number of factors, such as oxidation on the electrodes, loose connections between the electrode and the cell, or a dirty or corroded junction. To solve this issue, it is important to ensure that the connection between the electrode and the cell is secure and clean. It may also be necessary to clean the electrodes in an acid bath or to replace them with new ones. Additionally, you may want to check the instrument settings to ensure that they are set correctly for the type of experiment being performed.
 

1. What is crossover in cyclic voltammetry and why is it an issue?

Crossover in cyclic voltammetry refers to the phenomenon where the oxidation and reduction peaks of different species overlap, making it difficult to accurately determine the individual peak potentials. This can be an issue because it can lead to incorrect interpretation of the data and inaccurate measurements of the analyte concentrations.

2. How does crossover occur in cyclic voltammetry?

Crossover can occur in cyclic voltammetry when two or more electroactive species with similar redox potentials are present in the solution. As the voltage is scanned, the current from each species is superimposed, resulting in overlapping peaks. Additionally, diffusion of the species can also contribute to crossover.

3. What is the effect of scan rate on crossover in cyclic voltammetry?

The scan rate can have a significant effect on crossover in cyclic voltammetry. Higher scan rates can increase the extent of crossover as the peaks become broader and more difficult to distinguish. Lower scan rates, on the other hand, can help reduce crossover by allowing more time for the species to diffuse and separate.

4. How can crossover be corrected or minimized in cyclic voltammetry?

There are several ways to correct or minimize crossover in cyclic voltammetry. One approach is to use a smaller working electrode, which can help reduce the diffusion effects and make it easier to distinguish the peaks. Another method is to vary the scan rate, as mentioned earlier. Additionally, using a different supporting electrolyte or adjusting the pH of the solution can also help separate the peaks and reduce crossover.

5. Are there any software tools available to help solve crossover issues in cyclic voltammetry?

Yes, there are software tools available that can help with solving crossover issues in cyclic voltammetry. These tools use advanced algorithms to deconvolute the overlapping peaks and determine the individual peak potentials and current values. Some examples of these software tools include PeakFit, Origin, and CVAnalyzer.

Similar threads

How to prepare sample for cyclic voltammetry measurement
    • Chemistry
Replies
1
Views
2K
Cyclic voltammetry of GOX
    • Chemistry
Replies
4
Views
4K
Chemically regenerating my auto's catalytic converter?
    • Chemistry
Replies
16
Views
2K
Static Electricity- Solving Material Placement Issues
    • General Engineering
Replies
4
Views
2K
A The Blessings of Dimensionality and Hilbert's 6th Problem
    • Set Theory, Logic, Probability, Statistics
Replies
4
Views
1K
Physicists in Industry - Action Needed
    • STEM Educators and Teaching
Replies
7
Views
1K
Goodness of fit: How to decide which ratio to deal with?
    • Biology and Chemistry Homework Help
Replies
3
Views
1K
Book Review: Invisible Women: Data Bias in a World Designed for Men
    • General Discussion
Replies
19
Views
1K
A How Many Hidden Variables Would It Take to Model Photon Polarization?
    • Quantum Interpretations and Foundations
2
Replies
45
Views
3K
Simple experiment to measure atmospheric Oxygen
    • Chemistry
Replies
4
Views
3K

Hot Threads

Recent Insights

Back
Top