This is the CV curve of my material. The current value gets decreases while increasing potential value. None of references had this type of graph. Can anyone please help me why this happens.
The current value is increasing instead of decreasing with increasing the scan rates, which is normal. Its a problem of plotting the raw data.
Hi Sujoy Sir,
The problem is not with scan rates Vs current values.
Already reported CV curves are differing in graph pattern
Hi Raj, It could be due to error in measurements. Try to multiply y-axis with -1 and see the results. Or measure the same by interchanging the probes.
Best of luck.
Hi Nandanapalli Sir,
Multiplying with -1 will give hopeful results sir. Is that type of reporting is correct
If you get the CV curve plotted in the right side after multiplying with -1 then it is correct to report.
The software or your potentiostat is using the US convention for the current sign: + for cathodic (reduction) current and - for anodic (oxidation current). It is the opposite of the international convention.
An example:
" A faradaic current due to the analyte’s reduction is a cathodic current, and its sign is positive. An anodic current is due to an oxidation reaction at the working electrode, and its sign is negative."
From: http://chemwiki.ucdavis.edu/Core/Analytical_Chemistry/Analytical_Chemistry_2.0/11_Electrochemical_Methods/11.4%3A_Voltammetric_Methods#Sign_Conventions
Verify if you have option to choose the international (also european) convention that is the one you know and is most used.
Thank you all researchers. Results are very nice after plotting the graph. Multiplying with -1 gives a good result. The problem is US convention current sign in the software.
- Badges
- Science topic
- Similar topics
- Computer Science and Engineering
- Artificial Intelligence