AMPEROMETRIC SENSORS BASED ON NAFION PROTON CONDUCTOR: A COMPARISON BETWEEN TWO DIFFERENT STRUCTURES

A.Fort, C. Lotti, M. Mugnaini, R.Palombari, S. Rocchi, V.Vignoli

Abstract:

In this work the authors propose the development and the characterization of two NO₂ 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 NO₂, a very low cross-response to interfering gases (CO, O₂), 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 NO₂ 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 NO₂ concentration range, but requires a more complicated front end electronics.
Keywords:
Download:

IMEKO-TC4-2008-049.pdf
DOI:

_unreg_tc4-2008.049

Event details:

IMEKO TC:

TC4
Event name:

Exploring New Frontiers of Instrumentation and Methods for Electrical and Electronic Measurements
Title:

XVIth IMEKO TC4 International Symposium on Electrical Measurements and Instrumentation (together with 13th IMEKO TC4 Workshop on ADC Modelling and Testing)
Place:

Florence, ITALY
Time:

22 September 2008 - 24 September 2008