AMPEROMETRIC SENSORS BASED ON NAFION PROTON CONDUCTOR: A COMPARISON BETWEEN TWO DIFFERENT STRUCTURES
Abstract
In this work the authors propose the development and the characterization of two NO<sub>2</sub> amperometric detection systems, based on two different solid state electrochemical sensors. Both sensors have a Nickel Oxide counter electrode, a Graphite working electrode, and Nafion as protonic conductor. The first detection system exploits a two-electrode sensor that presents satisfactory sensitivity to NO<sub>2</sub>, a very low cross-response to interfering gases (CO, O<sub>2</sub>), a short response time, and that requires a simple front-end electronics. Nevertheless, the usage of this sensor is limited to the detection of low NO<sub>2</sub> concentrations (below 10 ppm). A similar performance can be obtained by a system based on a three-electrode version of the sensor which can be used in a wider NO<sub>2</sub> concentration range, but requires a more complicated front end electronics.
Event details
- Event
- Exploring New Frontiers of Instrumentation and Methods for Electrical and Electronic Measurements
- Technical Committee
- TC4
- Place
- Florence, ITALY
- Time
- 22 September 2008 - 24 September 2008
- Website
- http://www.imeko2008.org/