Strategies for the determination of the convective-diffusion limiting current from steady state linear sweep voltammetry


Ponce de León, C., Low, C.T.J., Kear, G. and Walsh, F.C. (2007) Strategies for the determination of the convective-diffusion limiting current from steady state linear sweep voltammetry. Journal of Applied Electrochemistry, 10pp. (doi:10.1007/s10800-007-9392-3). (In Press).

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Description/Abstract

The limiting current is an important parameter for the characterization of mass transport in electrochemical systems operating under convective-diffusion control. Four methods to determine the limiting current from current (I) vs. potential (E) plots are considered. Strategies to determine the limiting current values include: 1) direct measurement from I vs. E curves, 2) estimation from the current value at EL =DE/2 where DE is the length of the limiting current plateau), 3) evaluation of the first derivative dI/dE in the I vs. E curve and 4) from plots of E/I vs. I-1. The electrode reactions chosen to demonstrate the different strategies are: Cu(II) → Cu(I) and Cu(I) → Cu(0) in 1.5 mol dm-3 NaCl (pH 2) at a platinum rotating disc electrode and K3Fe(CN)6 → K4Fe(CN)6 in 1 mol dm-3 NaOH at a 60 ppi reticulated vitreous carbon electrode (RVC).

Item Type: Article
ISSNs: 0021-891X (print)
Related URLs:
Keywords: copper deposition, ferricyanide, mass transport, limiting current, polarization curves, voltammetry, reticulated vitreous carbon, rotating disc electrode
Subjects: T Technology > TP Chemical technology
Q Science > QD Chemistry
Divisions: University Structure - Pre August 2011 > School of Engineering Sciences > Engineering Materials & Surface Engineering
ePrint ID: 48275
Date Deposited: 27 Sep 2007
Last Modified: 27 Mar 2014 18:32
URI: http://eprints.soton.ac.uk/id/eprint/48275

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