New catalyst monitoring sensor for gasoline engine using YSZ-Al2O3 as solid electrolyte and gas diffusion barrier

Jong Heun Lee, Byung Ki Kim, Kyo Yeol Lee, Ho In Kim, Ki Woo Han

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

A new sensor to monitor the degradation of three-way catalyst was designed by stacking three layers of the same YSZ (Yttria Stabilized Zirconia)-Al2O3 porous composite with two Pt electrodes being inserted in between. Each composite layer could serve as an oxide-ionic conductor as well as a gas diffusion barrier. Under an appropriate polarization voltage (0.4 V) applied between the Pt electrodes, the central layer attached with the electrodes, Pt|YSZ-Al2O3|Pt, worked as an oxygen pumping cell, while the upper or lower YSZ-Al2O3 layer worked as a gas diffusion barrier to provide the limiting current with respect to excess O2 in the fuel-lean atmosphere or that with respect to excess reducing gases like CO, H2, and CmHn in the fuel-rich condition. The amperometric signal was well proportional to the deviation of air/fuel ratio from the stoichiometric one so that a wide range of catalyst degradation could be monitored very well by this sensor. This sensor has advantages of simple operating algorithm, easy fabrication, and high thermal shock resistance.

Original languageEnglish
Pages (from-to)9-15
Number of pages7
JournalSensors and Actuators, B: Chemical
Volume59
Issue number1
DOIs
Publication statusPublished - 1999 Oct 5
Externally publishedYes

Fingerprint

gasoline
Diffusion barriers
gaseous diffusion
Diffusion in gases
Yttria stabilized zirconia
Solid electrolytes
solid electrolytes
yttria-stabilized zirconia
Gasoline
engines
Engines
catalysts
Electrodes
Catalysts
Monitoring
sensors
Sensors
electrodes
Degradation
Composite materials

ASJC Scopus subject areas

  • Analytical Chemistry
  • Electrochemistry
  • Electrical and Electronic Engineering

Cite this

New catalyst monitoring sensor for gasoline engine using YSZ-Al2O3 as solid electrolyte and gas diffusion barrier. / Lee, Jong Heun; Kim, Byung Ki; Lee, Kyo Yeol; Kim, Ho In; Han, Ki Woo.

In: Sensors and Actuators, B: Chemical, Vol. 59, No. 1, 05.10.1999, p. 9-15.

Research output: Contribution to journalArticle

@article{ac869997d7e14d13baae522ffbd744e9,
title = "New catalyst monitoring sensor for gasoline engine using YSZ-Al2O3 as solid electrolyte and gas diffusion barrier",
abstract = "A new sensor to monitor the degradation of three-way catalyst was designed by stacking three layers of the same YSZ (Yttria Stabilized Zirconia)-Al2O3 porous composite with two Pt electrodes being inserted in between. Each composite layer could serve as an oxide-ionic conductor as well as a gas diffusion barrier. Under an appropriate polarization voltage (0.4 V) applied between the Pt electrodes, the central layer attached with the electrodes, Pt|YSZ-Al2O3|Pt, worked as an oxygen pumping cell, while the upper or lower YSZ-Al2O3 layer worked as a gas diffusion barrier to provide the limiting current with respect to excess O2 in the fuel-lean atmosphere or that with respect to excess reducing gases like CO, H2, and CmHn in the fuel-rich condition. The amperometric signal was well proportional to the deviation of air/fuel ratio from the stoichiometric one so that a wide range of catalyst degradation could be monitored very well by this sensor. This sensor has advantages of simple operating algorithm, easy fabrication, and high thermal shock resistance.",
author = "Lee, {Jong Heun} and Kim, {Byung Ki} and Lee, {Kyo Yeol} and Kim, {Ho In} and Han, {Ki Woo}",
year = "1999",
month = "10",
day = "5",
doi = "10.1016/S0925-4005(99)00008-8",
language = "English",
volume = "59",
pages = "9--15",
journal = "Sensors and Actuators, B: Chemical",
issn = "0925-4005",
publisher = "Elsevier",
number = "1",

}

TY - JOUR

T1 - New catalyst monitoring sensor for gasoline engine using YSZ-Al2O3 as solid electrolyte and gas diffusion barrier

AU - Lee, Jong Heun

AU - Kim, Byung Ki

AU - Lee, Kyo Yeol

AU - Kim, Ho In

AU - Han, Ki Woo

PY - 1999/10/5

Y1 - 1999/10/5

N2 - A new sensor to monitor the degradation of three-way catalyst was designed by stacking three layers of the same YSZ (Yttria Stabilized Zirconia)-Al2O3 porous composite with two Pt electrodes being inserted in between. Each composite layer could serve as an oxide-ionic conductor as well as a gas diffusion barrier. Under an appropriate polarization voltage (0.4 V) applied between the Pt electrodes, the central layer attached with the electrodes, Pt|YSZ-Al2O3|Pt, worked as an oxygen pumping cell, while the upper or lower YSZ-Al2O3 layer worked as a gas diffusion barrier to provide the limiting current with respect to excess O2 in the fuel-lean atmosphere or that with respect to excess reducing gases like CO, H2, and CmHn in the fuel-rich condition. The amperometric signal was well proportional to the deviation of air/fuel ratio from the stoichiometric one so that a wide range of catalyst degradation could be monitored very well by this sensor. This sensor has advantages of simple operating algorithm, easy fabrication, and high thermal shock resistance.

AB - A new sensor to monitor the degradation of three-way catalyst was designed by stacking three layers of the same YSZ (Yttria Stabilized Zirconia)-Al2O3 porous composite with two Pt electrodes being inserted in between. Each composite layer could serve as an oxide-ionic conductor as well as a gas diffusion barrier. Under an appropriate polarization voltage (0.4 V) applied between the Pt electrodes, the central layer attached with the electrodes, Pt|YSZ-Al2O3|Pt, worked as an oxygen pumping cell, while the upper or lower YSZ-Al2O3 layer worked as a gas diffusion barrier to provide the limiting current with respect to excess O2 in the fuel-lean atmosphere or that with respect to excess reducing gases like CO, H2, and CmHn in the fuel-rich condition. The amperometric signal was well proportional to the deviation of air/fuel ratio from the stoichiometric one so that a wide range of catalyst degradation could be monitored very well by this sensor. This sensor has advantages of simple operating algorithm, easy fabrication, and high thermal shock resistance.

UR - http://www.scopus.com/inward/record.url?scp=0033316830&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0033316830&partnerID=8YFLogxK

U2 - 10.1016/S0925-4005(99)00008-8

DO - 10.1016/S0925-4005(99)00008-8

M3 - Article

AN - SCOPUS:0033316830

VL - 59

SP - 9

EP - 15

JO - Sensors and Actuators, B: Chemical

JF - Sensors and Actuators, B: Chemical

SN - 0925-4005

IS - 1

ER -