Electrochemical Oxidation and Sensing of Methylamine Gas in Room Temperature Ionic Liquids

被引：19
作者：
Murugappan, Krishnan [1 ]
Kang, Colin [1 ]
Silvester, Debbie S. [1 ]
机构：
[1] Curtin Univ, Nanochem Res Inst, Dept Chem, Perth, WA 6845, Australia
来源：
JOURNAL OF PHYSICAL CHEMISTRY C | 2014年 / 118卷 / 33期
基金：
澳大利亚研究理事会;
关键词：
PLATINUM-ELECTRODES; VOLTAMMETRY; REDUCTION; HYDROGEN; ELECTROREDUCTION; DIOXIDE; AMMONIA; OXYGEN; WATER;
D O I：
10.1021/jp5061045
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The electrochemical behavior of methylamine gas in several room temperature ionic liquids (RTILs), [C(2)mim][NTf2], [C(4)mim][NTf2], [C(6)mim][FAP], [C(4)mpyrr][NTf2], [C(4)mim][BF4], and [C(4)mim][PF6], has been investigated on a Pt microelectrode using cyclic voltammetry. A broad oxidation wave at approximately 3 V, two reduction peaks, and another oxidation peak were observed. A complicated mechanism is predicted based on the voltammetry obtained, with ammonia gas as a likely byproduct. The currents obtained suggest that methylamine has a high solubility in RTILs, which is important for gas-sensing applications. The analytical utility of methylamine was then studied in [C(4)mpyrr][NTf2] and [C(2)mim][NTf2]. A linear calibration graph with an R-2 value of 0.99 and limits of detection of 33 and 34 ppm were obtained, respectively, suggesting that RTILs are favorable nonvolatile solvents for the electrochemical detection of highly toxic methylamine gas.
引用
收藏
页码：19232 / 19237
页数：6
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