Make a voltammetry in a blank solution with and without purge, by this way you can know the oxigen reduction potential in your experimental setup. Best regards

If you are studying a reduction (cathodic) reaction that takes place at potentials close to those of oxygen reduction, you should definitely purge your electrolytic solutions with nitrogen or argon.

Daniela's suggestion is generally correct. However, when the reduction potential of the compound or substance you are studying occurs further away from the oxygen reduction potential, you can do CV and DPV measurements without the need to remove dissolve oxygen. Also when the concentration of the substance is substantially higher than the concentration of dissolved oxygen, the removal of oxygen may have little or no effect. You can also judiciously avoid the need to remove dissolved oxygen by choice of electrolyte (e.g. high concentration/saturated solution with low dissolved oxygen) and choice of electrode material.

Thank you @Daniala Plana and @Samuel Adeloju for your really kind guidance,

Could you please tell me beyond which range of potential we can run voltammetric experiments without purging when we are focusing on reduction (possibly the safe reduction potential range to avoid purging).

2nd option is also a good suggestion regarding concentrated background electrolyte solution, would definitely try to apply it also.

Unfortunately, it's not easy to just give you potentials... it will depend on what pH you work in, the temperature and also a little on the material that your working electrode is made of... if you look up the potential for oxygen reduction (there's 2, one to peroxide and one to water.... I think they are somewhat around 0.2V vs SHE at room temperature and pH 0, but you should look it up) you can then correct it for pH and temperature using the Nerst equation...

Yes I will look up into by considering parameters of reaction set-up electrolyte, electrode material and pH etc as you have mentioned and would try to optimize using Nerst Equation. Thanks again for your points @Daniela :)

Make a voltammetry in a blank solution with and without purge, by this way you can know the oxigen reduction potential in your experimental setup. Best regards

Idea is good by comparative study, Thanks and regards too for adding your suggestion :) @Sebastian