Strategies for the determination of the convective-diffusion limiting current from steady state linear sweep voltammetry
Strategies for the determination of the convective-diffusion limiting current from steady state linear sweep voltammetry
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).
copper deposition, ferricyanide, mass transport, limiting current, polarization curves, voltammetry, reticulated vitreous carbon, rotating disc electrode
10pp
Ponce de León, C.
508a312e-75ff-4bcb-9151-dacc424d755c
Low, C.T.J.
e993d0ca-2b64-424b-9535-20bc8b78415f
Kear, G.
eb25b3ff-b75c-47ba-b545-233fee85b0a3
Walsh, F.C.
309528e7-062e-439b-af40-9309bc91efb2
Ponce de León, C.
508a312e-75ff-4bcb-9151-dacc424d755c
Low, C.T.J.
e993d0ca-2b64-424b-9535-20bc8b78415f
Kear, G.
eb25b3ff-b75c-47ba-b545-233fee85b0a3
Walsh, F.C.
309528e7-062e-439b-af40-9309bc91efb2
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, .
(doi:10.1007/s10800-007-9392-3).
(In Press)
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).
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Accepted/In Press date: 27 September 2007
Keywords:
copper deposition, ferricyanide, mass transport, limiting current, polarization curves, voltammetry, reticulated vitreous carbon, rotating disc electrode
Organisations:
Engineering Mats & Surface Engineerg Gp
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Local EPrints ID: 48275
URI: http://eprints.soton.ac.uk/id/eprint/48275
PURE UUID: 3e96eb45-fd46-4766-9d67-907105a59655
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Date deposited: 27 Sep 2007
Last modified: 16 Mar 2024 03:43
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Author:
C.T.J. Low
Author:
G. Kear
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