Nasicon-based potentiometric Cl2 sensor using Cr2O3 sensing electrode

Author

Zhang, Han ; Liang, Xishuang ; Li, Jianguo ; Lu, Geyu

Author_Institution

State Key Lab. on Integrated Optoelectron., Jilin Univ., Changchun, China

fYear

2011

fDate

5-9 June 2011

Firstpage

174

Lastpage

177

Abstract

A NASICON-based electrochemical device attached with an oxide electrode was developed for the detection of Cl₂ in air at high temperature. Among the oxides tested, Cr₂O₃ was found to be the best suited for the sensing electrode. The ΔEMF value of the device attached with Cr₂O₃ was almost linear with the logarithm of 5-50 ppm Cl₂ concentration. It was also observed that the sensor showed a speedy response and recovery kinetics to Cl₂. In addition, the device exhibited excellent selectivity to Cl₂ against the other interference gases, such as CO, NO, NO₂, H₂, C₇H₈, C₂H₄ and CH₄. The buried reference electrode can effectively improve the sensitivity of the sensor.

Keywords

chemical sensors; chlorine; chromium compounds; electrochemical electrodes; Cl₂; Cr₂O₃; buried reference electrode; electrochemical device; nasicon-based potentiometric sensor; oxide electrode; recovery kinetics; sensing electrode; speedy response; Electric potential; Electrodes; Gases; Sensitivity; Solids; Temperature sensors; Cl2 sensor; Cr2O3; NASICON; potentiometric;

fLanguage

English

Publisher

ieee

Conference_Titel

Solid-State Sensors, Actuators and Microsystems Conference (TRANSDUCERS), 2011 16th International

Conference_Location

Beijing

ISSN

Pending

Print_ISBN

978-1-4577-0157-3

Type

conf

DOI

10.1109/TRANSDUCERS.2011.5969253

Filename

5969253