Cyclic voltammetry of metallic acetylacetonate salts in quaternary ammonium and phosphonium based deep eutectic solvents

Mohammed Harun Chakrabarti, Nigel P. Brandon, Farouq S. Mjalli, Laleh Bahadori, Inas M. Al Nashef, Mohd Ali Hashim, M. A. Hussain, Chee Tong John Low, Vladimir Yufit

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Seven commercially sourced acetylacetonate salts were investigated in deep eutectic solvents (DESs that were prepared from ethylene glycol and trifluoroacetamide hydrogen bond donors) by cyclic voltammetry, to identify electrolytes suitable for future applications in electrochemical energy storage devices. Although the solubilities are low and on the order of 0.02 mol·L-1 for the most soluble salts, some were found to display encouraging quasi-reversible electrochemical kinetics. For instance, the diffusion coefficients of copper(II) acetylacetonate and iron(III) acetylacetonate in the trifluoroacetamide based DES are 1.14 × 10 -8 and 5.12 × 10-9 cm2·s -1, which yields rate constants of 3.16 × 10-3 and 8.43 × 10-6 cm·s-1, respectively. These results are better than those obtained with the DESs prepared from ethylene glycol. The poor kinetics of the iron(III) acetylacetonate system was possibly due to the hygroscopic nature of the DESs that resulted in a continuous build-up of moisture in the system in spite of the maintenance of an inert atmosphere by means of a plastic glove bag. Further work is thus envisaged in an inert dry box that could lead to H-type glass cell charge/discharge experiments in the future.

Original languageEnglish
Pages (from-to)2329-2341
Number of pages13
JournalJournal of Solution Chemistry
Volume42
Issue number12
DOIs
Publication statusPublished - Dec 2013

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Ammonium Compounds
eutectics
Eutectics
Cyclic voltammetry
Salts
salts
iron
glycols
ethylene
Ethylene Glycol
Iron
gloves
inert atmosphere
bags
kinetics
energy storage
moisture
maintenance
boxes
plastics

Keywords

  • Acetylacetonate
  • Deep eutectic solvents
  • Electrochemical energy storage
  • Solubility

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Biochemistry
  • Biophysics
  • Molecular Biology

Cite this

Cyclic voltammetry of metallic acetylacetonate salts in quaternary ammonium and phosphonium based deep eutectic solvents. / Chakrabarti, Mohammed Harun; Brandon, Nigel P.; Mjalli, Farouq S.; Bahadori, Laleh; Al Nashef, Inas M.; Hashim, Mohd Ali; Hussain, M. A.; Low, Chee Tong John; Yufit, Vladimir.

In: Journal of Solution Chemistry, Vol. 42, No. 12, 12.2013, p. 2329-2341.

Research output: Contribution to journalArticle

Chakrabarti, MH, Brandon, NP, Mjalli, FS, Bahadori, L, Al Nashef, IM, Hashim, MA, Hussain, MA, Low, CTJ & Yufit, V 2013, 'Cyclic voltammetry of metallic acetylacetonate salts in quaternary ammonium and phosphonium based deep eutectic solvents', Journal of Solution Chemistry, vol. 42, no. 12, pp. 2329-2341. https://doi.org/10.1007/s10953-013-0111-x
Chakrabarti, Mohammed Harun ; Brandon, Nigel P. ; Mjalli, Farouq S. ; Bahadori, Laleh ; Al Nashef, Inas M. ; Hashim, Mohd Ali ; Hussain, M. A. ; Low, Chee Tong John ; Yufit, Vladimir. / Cyclic voltammetry of metallic acetylacetonate salts in quaternary ammonium and phosphonium based deep eutectic solvents. In: Journal of Solution Chemistry. 2013 ; Vol. 42, No. 12. pp. 2329-2341.
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