Voltammetric Studies of Proton Reduction in 1-Butyl-1-Methylpyrrolidinium Trifluoromethanesulfonate

被引:0
|
作者
Cheek, G. T. [1 ]
Roeper, D. F. [2 ]
O'Grady, W. E. [2 ,3 ]
机构
[1] US Naval Acad, Dept Chem, Annapolis, MD 21402 USA
[2] EXCET Inc, Springfield, VA 22151 USA
[3] Naval Res Lab, Div Chem, Code 6130, Washington, DC 20375 USA
来源
MOLTEN SALTS AND IONIC LIQUIDS 18 | 2012年 / 50卷 / 11期
关键词
TEMPERATURE IONIC LIQUIDS; WATER;
D O I
10.1149/05011.0097ecst
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
The reduction of trifluoromethanesulfonic acid (triflic acid) in the ionic liquid 1-butyl-1-methylpyrrolidinium trifluoromethanesulfonate (BMPY TfO) has been investigated at platinum. In the concentration range 7 mM to 55 mM, triflic acid undergoes a broad reduction process at -0.25V vs Ag/AgCl at 100 mV/s, followed by a narrower oxidation process at +0.40V. Addition of water results in shifts of these potentials to more central values, with closer peak spacing (340 mV) at the 4.00 : 1.00 mole ratio H2O : triflic acid point. These results suggest that the proton is associated via a three-center bond with two triflate anions in the BMPY TfO / triflic acid solution. Addition of water leads to complexation of the proton by water molecules, with a resulting potential shift for the redox processes.
引用
收藏
页码:97 / 103
页数:7
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