Mixed-potential-type NO2 sensors based on stabilized zirconia and CeO2-B2O3 (B = Fe, Cr) binary nanocomposites sensing electrodes

Rui You, Tianshuang Wang, Hongyan Yu, Jing Wang, Geyu Lu, Fangmeng Liu, Tianhong Cui

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Mixed-potential type (MPT) NO2 sensors equipped with CeO2-B2O3 (B = Fe, Cr) sensing electrode (SE) and yttria-stabilized-zirconia (YSZ-8Y) electrolyte are fabricated. The new ceria-based nanocomposites synthesized by sol-gel method improve the NO2 gas sensing properties significantly. The highest response to NO2 is found for the sensor using CeO2-Cr2O3 binary oxides with 1:1 Ce/Cr sintered at 800 °C, resulting in 100 mV to 100 ppm with relatively fast response and recovery times at the working temperature of 450 °C. A linear relation is obtained for the sensor with configuration of Pt/YSZ/CeO2-B2O3 (B = Fe, Cr) between potential difference (ΔV) and the logarithm of the concentration of NO2 from 5 to 200 ppm, which the sensitivities are 40.5 and 74.0 mV/decade, respectively. Additionally, the sensor's reproducibility, selectivity, cross-sensitivity and stability are investigated in details. Furthermore, the mixed potential sensing mechanism and catalytic activity to NO2 for ceria-based nanocomposites are also discussed.

Original languageEnglish (US)
Pages (from-to)793-804
Number of pages12
JournalSensors and Actuators, B: Chemical
Volume266
DOIs
StatePublished - Aug 1 2018

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zirconium oxides
Zirconia
Nanocomposites
nanocomposites
yttria-stabilized zirconia
Electrodes
electrodes
sensors
Cerium compounds
Sensors
Yttria stabilized zirconia
logarithms
Oxides
Sol-gel process
Electrolytes
catalytic activity
Catalyst activity
Gases
selectivity
recovery

Keywords

  • CeO-BO (B = Fe, Cr)
  • Mixed-potential
  • NO sensor
  • Yttria-stabilized-zirconia

Cite this

Mixed-potential-type NO2 sensors based on stabilized zirconia and CeO2-B2O3 (B = Fe, Cr) binary nanocomposites sensing electrodes. / You, Rui; Wang, Tianshuang; Yu, Hongyan; Wang, Jing; Lu, Geyu; Liu, Fangmeng; Cui, Tianhong.

In: Sensors and Actuators, B: Chemical, Vol. 266, 01.08.2018, p. 793-804.

Research output: Contribution to journalArticle

You, Rui ; Wang, Tianshuang ; Yu, Hongyan ; Wang, Jing ; Lu, Geyu ; Liu, Fangmeng ; Cui, Tianhong. / Mixed-potential-type NO2 sensors based on stabilized zirconia and CeO2-B2O3 (B = Fe, Cr) binary nanocomposites sensing electrodes. In: Sensors and Actuators, B: Chemical. 2018 ; Vol. 266. pp. 793-804.
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AU - Liu, Fangmeng

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