Electrochemical behavior of NH4VO3 in glyceline DES studied by cyclic voltammetry method
Document Type
Article
Publication Date
1-1-2019
Abstract
In the present work, the redox behavior of vanadate ion in deep eutectic solvent (DES) was studied via cyclic voltammetry (CV) method where glyceline DES and NH4VO3 were used as electrolyte and the source of + 5 vanadium ions respectively. The CV showed a quasi-reversible redox couple pattern of + 5 to + 4 vanadium ions in glyceline DES. Analysis by UV-Vis revealed the presence of + 3 vanadium ions at λmax 545 nm. The glyceline DES does not only act as a solvent but also as a reducing agent by chemically reducing + 4 vanadium ions to the most stable oxidation state of + 3. Temperature dependence study of vanadate ion in glyceline DES showed that the peak current increased with temperature which enhances the reaction kinetics. In addition, the conductivity of NH4VO3 in glyceline DES improved remarkably with temperature, whereas its viscosity declined. Moreover, the Rs and Rct values decreased with increasing temperature. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature.
Keywords
Cyclic voltammetry, Deep eutectic solvents, Glyceline, Redox behavior, Vanadium
Divisions
physics,CHEMISTRY
Funders
University Malaya Research Grant (UMRG): RP020B-16SUS
Publication Title
Ionics
Volume
25
Issue
10
Publisher
Springer Verlag (Germany)