I have done cyclic voltammetry experiments. I know that the roughness factor is calculated by dividing the real surface area to geometric surface area. But i confused about the units.
roughness factor not have units. See AA(cm^2)/AG(cm^2), cancel the units
Dear Christian the paper in JPCC is excellent, very well done, in general the using impedance spectroscopy is good technical for estimate capacitance.
Thank you for your kind interest Dr. Punckt. i have already downloaded your recently published paper and the paper you suggested me to read.
Hi Gokce (salam)
Surface roughness is completely different from one working electrode to another and it completely dependent on your physical preparation of the surface (polishing, washing, ultrasonication,...), reaction media (aq or nonaq), electrochemical cleaning at last and can not be the same even in a series of the same electrochemical tests becasue of the new ET in each run. Anyway, it can be estimated approximately for any special WE with a limited surface area. Platinum electrodes can be less affected by corrosive reactin media than the others so its surface roughness can be approximately less changed.
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