Onset potential of oxygen reduction in LSV using KOH as electrolyte and Ag/AgCl as reference electrode.
Dear Anand,
In general people uses: The onset potential is indeed the potential at which current starts to rises form 0 (a reaction starts taking place) or The potential at which you observe the sharp increase in reduction current (start negative current) is known as onset potential.
Best Regards,
Bapi
Hi Brother, Bapi Bera,
I have a confusion, I have done LSV but I don't know how to know /Calculate maximum potential and current in that LSV result. please help me I will be thankful.
Dear Anand,
Plot the data in a origin and the draw the line like shown in the attached image and you will get the onset potential. For example in the graph it was shown, -103 mV corresponds to the onset potential of the cathodic reaction. (for example hydrogen evolution) Most of the people use -103 mV as a onset potential but some literature they calculate the onset potential as 179 mV was calculated. (figure taken form one RG question)
Best Regards,
Bapi
Onset potentials is the lowest (for the anodic reactions) or the highest (for the cathodic reactions) potentials at which a reaction product is formed at a given electrode and at defined conditions. But researchers reported it at different current density values. For example in above curve 103 mv is the onset potential at 0 mA/cm2 current density and 179mv is the onset potential at some value of current density. Standard onset potential reported at 10 mA/cm2.
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