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 limit...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
2007-09-27.
|
| Subjects: | |
| Online Access: | Get fulltext |
| LEADER | 01393 am a22001573u 4500 | ||
|---|---|---|---|
| 001 | 48275 | ||
| 042 | |a dc | ||
| 100 | 1 | 0 | |a Ponce de León, C. |e author |
| 700 | 1 | 0 | |a Low, C.T.J. |e author |
| 700 | 1 | 0 | |a Kear, G. |e author |
| 700 | 1 | 0 | |a Walsh, F.C. |e author |
| 245 | 0 | 0 | |a Strategies for the determination of the convective-diffusion limiting current from steady state linear sweep voltammetry |
| 260 | |c 2007-09-27. | ||
| 856 | |z Get fulltext |u https://eprints.soton.ac.uk/48275/1/Strategies_for_the_determination_of_limiting_current.pdf | ||
| 520 | |a 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). | ||
| 655 | 7 | |a Article | |