Abstract
The electrochemical behaviour of commercially sourced iron (III) acetylacetonate is investigated in six different deep eutectic solvents (DESs) formed by means of hydrogen bonding between ammonium and phosphonium salts with glycerol, ethylene glycol and tri-ethylene glycol. Cyclic voltammetry (CV) is employed to determine kinetic and mass transport properties of the electrolytes. Diffusion coefficient, D, of the iron salt in all studied DESs is found to lie between 1.06×10-9 to 1.08×10-8 cm2 s-1 (the salt does not dissolve in a DES prepared from choline chloride and glycerol while not producing any measurable CV peaks in a couple of others). The rate constant for electron transfer across the working electrode/DES interface is estimated to lie between 1.34 × 10-4 and 2.08 × 10-4 cm s-1. From a range of criteria for electrolyte selection (peak potential separation near 59 mV for a one-electron transfer reaction, high diffusion coefficient and heterogeneous rate constant) only the ammonium based DESs prepared from choline chloride and ethylene glycol or tri-ethylene glycol appear to be worthy of further investigation.
| Original language | English |
|---|---|
| Pages (from-to) | 9652-9676 |
| Number of pages | 25 |
| Journal | International Journal of Electrochemical Science |
| Volume | 8 |
| Issue number | 7 |
| Publication status | Published - 2013 |
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Keywords
- Cyclic voltammetry
- Deep eutectic solvent
- Diffusion coefficient
- Iron (III) acetylacetonate
- Rate constant
ASJC Scopus subject areas
- Electrochemistry
Cite this
Cyclic voltammetry of iron (III) acetylacetonate in quaternary ammonium and phosphonium based deep eutectic solvents. / Chakrabarti, Mohammed M.; Brandon, Nigel N.; Hashim, Mohd M.; Mjalli, Farouq F.; AlNashef, Inas I.; Bahadori, Laleh; Manan, Ninie S A; Hussain, M. A.; Yufit, Vladimir.
In: International Journal of Electrochemical Science, Vol. 8, No. 7, 2013, p. 9652-9676.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Cyclic voltammetry of iron (III) acetylacetonate in quaternary ammonium and phosphonium based deep eutectic solvents
AU - Chakrabarti, Mohammed M.
AU - Brandon, Nigel N.
AU - Hashim, Mohd M.
AU - Mjalli, Farouq F.
AU - AlNashef, Inas I.
AU - Bahadori, Laleh
AU - Manan, Ninie S A
AU - Hussain, M. A.
AU - Yufit, Vladimir
PY - 2013
Y1 - 2013
N2 - The electrochemical behaviour of commercially sourced iron (III) acetylacetonate is investigated in six different deep eutectic solvents (DESs) formed by means of hydrogen bonding between ammonium and phosphonium salts with glycerol, ethylene glycol and tri-ethylene glycol. Cyclic voltammetry (CV) is employed to determine kinetic and mass transport properties of the electrolytes. Diffusion coefficient, D, of the iron salt in all studied DESs is found to lie between 1.06×10-9 to 1.08×10-8 cm2 s-1 (the salt does not dissolve in a DES prepared from choline chloride and glycerol while not producing any measurable CV peaks in a couple of others). The rate constant for electron transfer across the working electrode/DES interface is estimated to lie between 1.34 × 10-4 and 2.08 × 10-4 cm s-1. From a range of criteria for electrolyte selection (peak potential separation near 59 mV for a one-electron transfer reaction, high diffusion coefficient and heterogeneous rate constant) only the ammonium based DESs prepared from choline chloride and ethylene glycol or tri-ethylene glycol appear to be worthy of further investigation.
AB - The electrochemical behaviour of commercially sourced iron (III) acetylacetonate is investigated in six different deep eutectic solvents (DESs) formed by means of hydrogen bonding between ammonium and phosphonium salts with glycerol, ethylene glycol and tri-ethylene glycol. Cyclic voltammetry (CV) is employed to determine kinetic and mass transport properties of the electrolytes. Diffusion coefficient, D, of the iron salt in all studied DESs is found to lie between 1.06×10-9 to 1.08×10-8 cm2 s-1 (the salt does not dissolve in a DES prepared from choline chloride and glycerol while not producing any measurable CV peaks in a couple of others). The rate constant for electron transfer across the working electrode/DES interface is estimated to lie between 1.34 × 10-4 and 2.08 × 10-4 cm s-1. From a range of criteria for electrolyte selection (peak potential separation near 59 mV for a one-electron transfer reaction, high diffusion coefficient and heterogeneous rate constant) only the ammonium based DESs prepared from choline chloride and ethylene glycol or tri-ethylene glycol appear to be worthy of further investigation.
KW - Cyclic voltammetry
KW - Deep eutectic solvent
KW - Diffusion coefficient
KW - Iron (III) acetylacetonate
KW - Rate constant
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M3 - Article
VL - 8
SP - 9652
EP - 9676
JO - International Journal of Electrochemical Science
JF - International Journal of Electrochemical Science
SN - 1452-3981
IS - 7
ER -