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Title: Development of a Zirconia-Based Electrochemical Sensor for the Detection of Hydrogen in Air

Abstract

Mixed potential sensors utilizing a machined, dense indium-tin oxide working electrode (In{sub 2}O{sub 3}:SnO{sub 2}; 90%:10%), a Pt wire counter electrode, and porous YSZ electrolyte were prepared using ceramic tape casting methods. The response of these devices to hydrogen concentrations up to 2% in air were studied from 600 to 740 C. The sensor response exhibited a reversible behavior and a fast response time with sensitivity increasing with decreasing temperature. GC analysis confirmed significant heterogeneous oxidation of the H{sub 2} on heated furnace tube wall surfaces thus driving sensor response at H{sub 2} concentrations greater than a few hundred ppm. The transition to a cold wall, miniature platform heater significantly reduced hydrogen oxidation although some flow rate dependence remains.

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
945546
Report Number(s):
LLNL-CONF-405563
TRN: US200903%%636
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Conference
Resource Relation:
Conference: Presented at: 214th Meeting of the Electrochem. Soc., Honolulu, HI, United States, Oct 12 - Oct 17, 2008
Country of Publication:
United States
Language:
English
Subject:
08 HYDROGEN; AIR; CASTING; CERAMICS; DETECTION; ELECTRODES; ELECTROLYTES; FLOW RATE; FURNACES; HEATERS; HYDROGEN; OXIDATION; OXIDES; SENSITIVITY

Citation Formats

Brosha, E, Mukundan, R, Lujan, R, Garzon, F, Woo, L, Worsley, M, and Glass, B. Development of a Zirconia-Based Electrochemical Sensor for the Detection of Hydrogen in Air. United States: N. p., 2008. Web.
Brosha, E, Mukundan, R, Lujan, R, Garzon, F, Woo, L, Worsley, M, & Glass, B. Development of a Zirconia-Based Electrochemical Sensor for the Detection of Hydrogen in Air. United States.
Brosha, E, Mukundan, R, Lujan, R, Garzon, F, Woo, L, Worsley, M, and Glass, B. Wed . "Development of a Zirconia-Based Electrochemical Sensor for the Detection of Hydrogen in Air". United States. https://www.osti.gov/servlets/purl/945546.
@article{osti_945546,
title = {Development of a Zirconia-Based Electrochemical Sensor for the Detection of Hydrogen in Air},
author = {Brosha, E and Mukundan, R and Lujan, R and Garzon, F and Woo, L and Worsley, M and Glass, B},
abstractNote = {Mixed potential sensors utilizing a machined, dense indium-tin oxide working electrode (In{sub 2}O{sub 3}:SnO{sub 2}; 90%:10%), a Pt wire counter electrode, and porous YSZ electrolyte were prepared using ceramic tape casting methods. The response of these devices to hydrogen concentrations up to 2% in air were studied from 600 to 740 C. The sensor response exhibited a reversible behavior and a fast response time with sensitivity increasing with decreasing temperature. GC analysis confirmed significant heterogeneous oxidation of the H{sub 2} on heated furnace tube wall surfaces thus driving sensor response at H{sub 2} concentrations greater than a few hundred ppm. The transition to a cold wall, miniature platform heater significantly reduced hydrogen oxidation although some flow rate dependence remains.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2008},
month = {7}
}

Conference:
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