I have a CV with H region. I want to remove the charge associated with H. How do I do this in a easy way. Is there any software, which I can make use of
regards
Dear Deepak,
you supply too little information. If I am to suggest something I need to know :
1. C-V measurement, is it charge integration measurement or capacitance measurement at some (what ?) frequency ?
2. Describe the system you measure, sample geometry, the electrodes
3. What is H region ? How are you sure that you know that in your data there is H region. In the usual charge/impedance/capacitance measurements, this kind of statement does not really give a sense.
With best regards
Petr
Dear Deepak,
if you mean software to remove "H" region from your C-V data, I ca not help you there since, as I already mentioned, I need more information.
On general aspects of Electrochemical Impedance Spectroscopy (Capacitance, Impedance measurements on electrochemical systems) you could consult a monograph by Mark E. Ozarem and Bernard Tribollet "Electrochemical Impedance Specttroscopy" (Wiley 2008).
With best regards
Petr
Hi Peter
I know it is H region from theoretical calculation and also from observation, I definitely observe H production
It is a three electrode cell
I have attached the CV. I need a software that can remove the current due to H evolution
Thanks
Dear Deepak,
when you say observation, do you mean that H bubbles out of the solution at the electrode or do you infer it from the form of the CV data ?
Your CV data resembles data in Wikipedia apart from the feature on the way up that you see in your data but is absent in the "standard" CV data. Is that H evolution ?
Under cyclic voltammetry in Wikipedia, there are two slopes indicated. Is that what you are after ?
I myself would treat these type of measurements with caution, since they are non-equilibrium, non-steady state measurements. On the other hand one has to admit that useful information is apparently possible to retrieve and the original method (polarography) hase been an importnat part of electrochemistry since 1959. Nevertheless, I would complement these CV voltammetry measurements with dc bias dependence of the electrical impedance (EIS measurements). Here you get the full information.
Best regards
Petr
Hi Peter
Thanks for the suggestions. H can be seen both on CV curves and also in the cell
Could you please attach the page link, so that I can understand on what you are explaining?
Thanks
Dear Deepak,
I have no link to any particular article. What I wrote were/are my own thoughts. But perhaps you might look at the following : US patent 5 627 479, May 6, 1997.There is a detailed description/discussion of the Electrical Impedance Specstroscopy. Ijust tried to attach the full text, but I was not succesful.With best regards
Petr
P.S.: Well, it seems that it worked this time. If not , send me your e-mail and I will send it by e-mail
Select the lower limit of your scan to be -1.00 V , not 1.10 V and compare the results/CVs.
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