气体在不同离子液体中电化学响应灵敏度的研究

不同气体在不同离子液体中的电化学响应存在差异.本文以氢气、氧气作为目标研究气体,采用循环伏安法和计时安培电流法研究对比了基于两种不同离子液体[Bmpy][NTf2]和[Bmim][NTf2]的电化学传感器中气体的电化学行为,并就气体电化学信号的响应时间及灵敏度等电化学行为进行了讨论分析.结果表明:在[Bmpy][NTf...

Study of the electrochemical response sensitivity of gases in different ionic liquids

The electrochemical responses of different gases performs divergently in different ionic liquids.The hydrogen and oxygen were selected as the target study gases in this article,the cyclic voltammetry and the chronoamperometry were applied to study and analyze the electrochemical behavior including response time and sensitivity of these gases in ionic liquids[Bmpy][NTf₂]and[Bmim][NTf₂]based electrochemical sensor,respectively.The results showed that:the sensitivity of H 2 detection in[Bmpy][NTf₂]and[Bmim][NTf₂]are 4.93μA/%and 0.03μA/%,respectively.Furthermore,the relationship between the current signal and concentration of H 2 is linear;the sensitivity of O 2 detection in[Bmpy][NTf₂]and[Bmim][NTf₂]are-0.055 mA/%and-0.002 mA/%,respectively.Furthermore,the relationship between the current signal and concentration of O 2 is linear The research showed that gases tend to have better sensitivity and response ability in[Bmpy][NTf₂]compared with[Bmim][NTf₂],and it is also applicable to the mixed gas of hydrogen and oxygen.This work optimized the better ionic liquid electrolyte and could provide both of the theoretical and mechanical support for further study on electrochemical gas sensors.