Methane-oxygen electrochemical coupling in an ionic liquid: a robust sensor for simultaneous quantification.
Methane-oxygen electrochemical coupling in an ionic liquid: a robust sensor for simultaneous quantification.
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DOI：
10.1039/c4an00839a
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发表时间：
2014-10-21
期刊：
影响因子：
--
通讯作者：
Zeng X
中科院分区：
文献类型：
--
作者：
Wang Z;Guo M;Baker GA;Stetter JR;Lin L;Mason AJ;Zeng X
当前用于检测甲烷或天然气排放的传感器设备要么昂贵，而且具有高功率要求，要么无法提供快速响应。该报告描述了利用非挥发性和导电性吡咯烷的离子液体（IL）电解质（IL）电解质以及具有高灵敏度，选择性和稳定性的甲烷和氧双气体检测的创新内标方法，该报告介绍了一种电化学甲烷传感器。在Bis（三氟甲基磺酰基）（NTF2）基于ILS的铂电极（NTF2）的IL中，当包括氧气还原过程时，甲烷被电氧化以产生二氧化碳和水。甲烷氧化产生的原位产生的二氧化碳被证明为定量电化学氧气传感器信号提供了极好的内标。实时对甲烷和氧的同时定量通过交叉验证在单个样品基质中发生的两个环境气体通过交叉验证来增强测量的可靠性，并允许消除检测中几种类型的随机和系统误差。我们还使用单势和双重电位的计时计量法验证了该基于IL的甲烷传感器，该甲烷传感器均采用了常规的固体宏观电极和柔性微生物电极。
Current sensor devices for the detection of methane or natural gas emission are either expensive and have high power requirements or fail to provide a rapid response. This report describes an electrochemical methane sensor utilizing a non-volatile and conductive pyrrolidinium-based ionic liquid (IL) electrolyte and an innovative internal standard method for methane and oxygen dual-gas detection with high sensitivity, selectivity, and stability. At a platinum electrode in bis(trifluoromethylsulfonyl)imide (NTf2)-based ILs, methane is electro-oxidized to produce CO2 and water when an oxygen reduction process is included. The in situ generated CO2 arising from methane oxidation was shown to provide an excellent internal standard for quantification of the electrochemical oxygen sensor signal. The simultaneous quantification of both methane and oxygen in real time strengthens the reliability of the measurements by cross-validation of two ambient gases occurring within a single sample matrix and allows for the elimination of several types of random and systematic errors in the detection. We have also validated this IL-based methane sensor employing both conventional solid macroelectrodes and flexible microfabricated electrodes using single- and double-potential step chronoamperometry.
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影响因子：
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作者：
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通讯作者：
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影响因子：
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