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电化学(中英文) ›› 2000, Vol. 6 ›› Issue (3): 345-349. 

• 研究论文 • 上一篇    下一篇

脉冲电势调制型电化学气体传感器

周仲柏,冯良东,柳文军   

  1. 武汉大学化学系!湖北武汉430072,武汉大学化学系!湖北武汉430072,武汉大学化学系!湖北武汉430072
  • 收稿日期:2000-08-28 修回日期:2000-08-28 出版日期:2000-08-28 发布日期:2000-08-28

Pulse Potential Modulated Electrochemical Gas Sensors

ZHOU Zhong bai *, FENG Liang dong,LIU Wen jun   

  1. (Dept. of Chem. Wuhan Univ., Wuhan 430072,China
  • Received:2000-08-28 Revised:2000-08-28 Published:2000-08-28 Online:2000-08-28

摘要: 根据暂态电化学原理 ,使用微电极并融合计算机控制的快速电势调制技术和数据采集、处理功能 ,提出并建立了一类全新的集信号提取、处理与结果显示等功能于一体的“脉冲电势调制型气体传感器” .在优化传感器性能及其新的功能开发和集成方面取得了重要进展 ,是一类为常规电化学气体传感器无法比拟而有发展前景的暂态电化学多组份气体传感器 .

关键词: 脉冲电势调制型电化学气体传感器, 暂态电化学, 微电极, 快速电势调制技术, 多组份气体

Abstract: The current popular electrochemical gas sensors are mostly stable with regard to their operating states. As a result, the further improvement of sensor charcateristics is restricted by such a "steady state" . Based on the transient electrochemistry principle, a kind of all new transient electrochemical multi component gas sensors— "pulse potential modulated electrochemical gas sensors" was established by combining computer controlled fast modulated potential technique with microelectrode method.This novel approach provided a real time and dynamic sensor technique integrated with acquisition, treatment and display of signals for rapid simultaneous detecion of multicomponent gases, as illustrated by the case of monitoring of respiratory gases of carbon dioxide and oxygen. In addition,if a smaller sized working microelectrode was used, with proper computation and electrochemical systems the potential pulse duration could be shortened.This would further incease the measured speed, enhance the precision for the detection and detectable upper limit of CO 2 could be increased. As compared with conventional steady electrochemical gas sensors,the pulse potential modulated electrochemical gas sensors have made a new breakthrough in optimizing the sensor preformance and developing the sensor functions.

Key words: Pulse potential modulated electrochemical gas sensor, Transient electrochemistry, Microelectrode, Fast Modulated potential technique, Multi component gases

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