TY - JOUR
T1 - Investigating the electrochemical windows of ionic liquids
AU - Hayyan, Maan
AU - Mjalli, Farouq S.
AU - Hashim, Mohd Ali
AU - AlNashef, Inas M.
AU - Mei, Tan Xue
N1 - Funding Information:
The authors would like to express their thanks to University of Malaya HIR-MOHE (D000003-16001), FRGS, Centre for Ionic Liquids (UMCiL) , and the National Plan for Science, Technology, and Innovation at King Saud University (10-ENV1315-02), and the Petroleum and Chemical Engineering Department at Sultan Qaboos University for their support.
PY - 2013/1/25
Y1 - 2013/1/25
N2 - 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]+≈[MOPMPip]+>[S222]+>[BMPy]+≈[HPy]+≈[HPPy]+. The oxidative limits were found to follow the sequence of [TFSI]->[TPTP]->[TfO]->[DCA]->[TFA]-.
AB - 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]+≈[MOPMPip]+>[S222]+>[BMPy]+≈[HPy]+≈[HPPy]+. The oxidative limits were found to follow the sequence of [TFSI]->[TPTP]->[TfO]->[DCA]->[TFA]-.
KW - Ag/AgCl electrode
KW - Cut-off current
KW - Cyclic voltammetry
KW - Electrochemical window
KW - Glassy carbon macro-electrode
KW - Ionic liquid
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U2 - 10.1016/j.jiec.2012.07.011
DO - 10.1016/j.jiec.2012.07.011
M3 - Article
AN - SCOPUS:84870424281
SN - 1226-086X
VL - 19
SP - 106
EP - 112
JO - Journal of Industrial and Engineering Chemistry
JF - Journal of Industrial and Engineering Chemistry
IS - 1
ER -