Journal
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
Volume 19, Issue 1, Pages 106-112Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.jiec.2012.07.011
Keywords
Ionic liquid; Electrochemical window; Cyclic voltammetry; Cut-off current; Glassy carbon macro-electrode; Ag/AgCl electrode
Funding
- University of Malaya HIR-MOHE [D000003-16001]
- FRGS
- Centre for Ionic Liquids (UMCiL)
- National Plan for Science, Technology, and Innovation at King Saud University [10-ENV1315-02]
- Petroleum and Chemical Engineering Department at Sultan Qaboos University
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The structure effect on the electrochemical windows (EWs) was studied using cyclic voltammetry (CV) in 16 ionic liquids (ILs), consisting of various cations such as piperidinium, pyridinium, pyrrolidinium, phosphonium, morpholinium, ammonium, sulfonium and imidazolium, and anions including bis(trifluoromethylsulfonyl)imide, tris(pentafluoroethyl)trifluorophosphate, dicyanamide, trifluoroacetate and trifluoromethanesulfonate. It was found that all studied ILs have good EWs to be utilized as electrolytes in different electrochemical applications pertaining to industry. Furthermore, it was found that the structure of ILs affected the EW and both the cation and anion have important effect on the reductive and oxidative limits, respectively. The reductive limits of the studied ILs were found to follow the sequence of [P14,666](+) > [N112,1O2](+) > [HMPyrr](+) > [BMPyrr](+) > [EMIm](+) > [MOEMMor](+) approximate to [MOPMPip](+) > [S222](+) > [BMPy](+) [HPyr](+) approximate to [HPPy](+). The oxidative limits were found to follow the sequence of [TFSI](-) > [TPTP](-) > [TfO](-) > [DCA](-) > [TFA](-). (C) 2012 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
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