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Setting of time dependent study for cyclic voltammetry

Posted 1 oct. 2018, 23:33 UTC−4 Chemical, Chemical Reaction Engineering, Electrochemistry Version 5.3a 3 Replies

Chi Chen
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Dear all,

I want to define a time dependent study for cyclic voltammetry under the Transport of Diluted Species Interface. But I cannot find the way to define the parameter of scan rate. It seems the TDS interface don't provide a boundary of electrode surface with scan rate. Could anyone help me with the problem? Thank you very much.

Best, Chi

3 Replies Last Post 5 oct. 2018, 01:48 UTC−4
Lasse Murtomäki
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Posted: 6 years ago 4 oct. 2018, 05:57 UTC−4

I did this 4 years ago, wish this helps.

Lasse

I did this 4 years ago, wish this helps. Lasse

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Chi Chen
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Posted: 6 years ago 5 oct. 2018, 01:43 UTC−4

I did this 4 years ago, wish this helps.

Lasse

Hi Lasse,

Thank you for your help. I also found your glucose oxidation example.

As I want to simulate the CV of EDL, I donot want to include electrode reactions. So I introduced the electrostatic interface to define a stern layer. And I defined a scan signal (E1) according to your method at the electrostatic interface. But I didnot get the correct CV curves for EDL. And if I defined a periodic scan signal (E2), the errors occured. Are there anything wrong with my settings? And my mph file is attached. Thank you!

Best, Chi

>I did this 4 years ago, wish this helps. > >Lasse Hi Lasse, Thank you for your help. I also found your glucose oxidation example. As I want to simulate the CV of EDL, I donot want to include electrode reactions. So I introduced the electrostatic interface to define a stern layer. And I defined a scan signal (E1) according to your method at the electrostatic interface. But I didnot get the correct CV curves for EDL. And if I defined a periodic scan signal (E2), the errors occured. Are there anything wrong with my settings? And my mph file is attached. Thank you! Best, Chi

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Lasse Murtomäki
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Posted: 6 years ago 5 oct. 2018, 01:48 UTC−4

EDL relaxes so fast that - in my opinion - what you need to do is to calculate the electrode capacitance at various potentials (i.e. surface charge). Current during CV is then scan rate*capacitance.

EDL relaxes so fast that - in my opinion - what you need to do is to calculate the electrode capacitance at various potentials (i.e. surface charge). Current during CV is then scan rate*capacitance.

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