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Title: Selective CO detection by using indium oxide-based semiconductor gas sensor

Abstract

A compact, solid-state CO sensor has been in great demand for detecting incomplete combustion of gas appliances. Continuous CO monitoring of combustion exhaust can prevent a serious CO poisoning accident. From a screening test for the sensing properties of 26 single oxides, an In{sub 2}O{sub 3} sensor element was found to exhibit rather high sensitivity to both CO and H{sub 2} in wet air at 300 C. In order to improve the selectivity to CO vs. H{sub 2}, each of 33 metal oxides was added to In{sub 2}O{sub 3}. As a result, the addition of alkaline metal oxides was found to enhance markedly both sensitivity and selectivity to CO. Particularly, Rb{sub 2}O (5 weight percent)-In{sub 2}O{sub 3} element showed the highest CO selectivity. It could detect 500 to 4,000 ppm Co in wet air at 300 C satisfactorily.

Authors:
; ; ;  [1];  [2]
  1. Kyushu Univ., Kasuga, Fukuoka (Japan)
  2. Osaka Gas Co., Ltd. (Japan). Research and Development Center
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
212142
Resource Type:
Journal Article
Journal Name:
Journal of the Electrochemical Society
Additional Journal Information:
Journal Volume: 143; Journal Issue: 2; Other Information: PBD: Feb 1996
Country of Publication:
United States
Language:
English
Subject:
03 NATURAL GAS; CARBON MONOXIDE; GAS ANALYSIS; GAS APPLIANCES; AIR POLLUTION MONITORS; INDIUM OXIDES; INDOOR AIR POLLUTION; HEALTH HAZARDS; HYDROGEN; ADDITIVES; MATERIALS TESTING; RUBIDIUM OXIDES; SENSITIVITY; EXPERIMENTAL DATA

Citation Formats

Yamaura, Hiroyuki, Tamaki, Jun, Miura, Norio, Yamazoe, Noboru, and Moriya, Koji. Selective CO detection by using indium oxide-based semiconductor gas sensor. United States: N. p., 1996. Web. doi:10.1149/1.1836449.
Yamaura, Hiroyuki, Tamaki, Jun, Miura, Norio, Yamazoe, Noboru, & Moriya, Koji. Selective CO detection by using indium oxide-based semiconductor gas sensor. United States. https://doi.org/10.1149/1.1836449
Yamaura, Hiroyuki, Tamaki, Jun, Miura, Norio, Yamazoe, Noboru, and Moriya, Koji. 1996. "Selective CO detection by using indium oxide-based semiconductor gas sensor". United States. https://doi.org/10.1149/1.1836449.
@article{osti_212142,
title = {Selective CO detection by using indium oxide-based semiconductor gas sensor},
author = {Yamaura, Hiroyuki and Tamaki, Jun and Miura, Norio and Yamazoe, Noboru and Moriya, Koji},
abstractNote = {A compact, solid-state CO sensor has been in great demand for detecting incomplete combustion of gas appliances. Continuous CO monitoring of combustion exhaust can prevent a serious CO poisoning accident. From a screening test for the sensing properties of 26 single oxides, an In{sub 2}O{sub 3} sensor element was found to exhibit rather high sensitivity to both CO and H{sub 2} in wet air at 300 C. In order to improve the selectivity to CO vs. H{sub 2}, each of 33 metal oxides was added to In{sub 2}O{sub 3}. As a result, the addition of alkaline metal oxides was found to enhance markedly both sensitivity and selectivity to CO. Particularly, Rb{sub 2}O (5 weight percent)-In{sub 2}O{sub 3} element showed the highest CO selectivity. It could detect 500 to 4,000 ppm Co in wet air at 300 C satisfactorily.},
doi = {10.1149/1.1836449},
url = {https://www.osti.gov/biblio/212142}, journal = {Journal of the Electrochemical Society},
number = 2,
volume = 143,
place = {United States},
year = {Thu Feb 01 00:00:00 EST 1996},
month = {Thu Feb 01 00:00:00 EST 1996}
}