Actually CO2 reduction is target. So , I want to know that while doing the CV and lsv should there be purging of CO2 or before the experiment starts we should make the solution saturated with CO2? or we should do the CV in continuous purging of CO2. And if purging is necessary do we need to purge the solution before each scan at different scan rate ? Also i read that working electrode need to be activated so how to activate the working electrode and at what potential range and scan rate . Please also solve my query for the initial scan polarity ( what is its significance, does it affect the result )
Though the purpose behind the experiment is not clear but purging isnecessary in electrochemistry to get rid of oxygen. If the experiment target is reduction of CO2 then the solution must be saturated with CO2. In all cases the scan must be performed in a stagnant solution because cyclic voltammetry theory is based on diffusion as the mode of mass transfer.
Mohammed Hourani thank you so much for your reply. I was wanting to ask that for finding the electrochemical active surface area, we need to do cyclic voltammetry in certain potential range and at different scan rates. So How do we find that potential range and for scanning at different scan rate should we do purging of CO2 into the electrolytic solution which will be used in CO2 reduction or we can use any other electrolyte and any inert gas to do cyclic voltammetry to find ECSA ?
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