暂态电化学多组份气体传感器研究(I)多孔薄层电极库仑型气体传感器

常见的电化学气体传感器就其工作状态而言，大多属稳态类型，功能单一，传感器性能的提高受到“稳态”的制约，本文根据薄层电化学原理，提出并建立了一类全新的暂态电化学多组份气体传感器－多孔薄层电极库仑型气体传感器。这类以多孔薄层气体电极为核心元件构成的库仑型气体传感器，既有检测多种气体组份的功能，又有响应快、灵敏度高、低温度效应等优异性能。

Transient Electrochemical Multi-Component Gas Sensors(I)Porous Thin-Layer Electrode Coulometric Gas Sensor

The currently popular electrochemical gas sensors are mostly steady with regard to their operating state. As a result, the further improvement of sensor characteristics is restricted by such a “steady state”. Based on the thin-layer electrochemistry principle, a kind of allnew transient electrochemical multi-component gas sensor－－“porous thin-layer electrode coulometric gas sensor” has been designed and constructed with a hydrophobic thin-layer gasd iff using electrode. The response of such gas sensors is a transient peaked current signal, and the total amount of charge consumed in the exhaustive electrolysis of a solution confined in the thin layer is proportional to the concentration of the species monitored. As compared with conventional steady electrochemical gas sensors, the transient electrochemical multi-component gas sensors exhibited fast sampling rate, lower temperature coefficient of the calibration curves,higher sensitivity and good stability, as illustrated by the case of detection of anaesthetic ()2+N2O gas mixtures.