Abstract
The anodic behaviour of p-Si electrodes is investigated in water–ethanol media by rotating disk voltammetry. The water–alcohol media, in comparison to water, lead to: (i) distorted current–potential curves, with a comparative current growth in the region of low applied potentials; (ii) a shift of the maximum of the current–pH curves from about pH 3 in water to about pH 4 in 50% ethanol v/v; (iii) a marked increase in dissolution current measured at pH > 2, with an opposite effect at pH < 2. The effect of ethanol on the current is discussed considering the modification of the speciation equilibria of hydrofluoric acid and possible effects on the kinetics of dissolution of the surface oxide layer.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
