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Multi Layered Zirconia Oxygen Sensor with Modified Rhodium Catalyst Electrode
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English
Abstract
This paper describes the design and operation of the multi-layered zirconia heated exhaust gas oxygen sensor having small-sized and sheet-shaped sensing element.
This sensor uses an electrode modified with a rhodium catalyst and heater by means of the thick-film technique. This modification of an electrode's composition and construction affects the reaction on unburned components in exhaust gas as well as the sensor performance.
By the addition of a rhodium catalyst, the zirconia exhaust gas oxygen sensor shows acute sensitivity and faster response properties in the transient state on emission component(NOx) generation, in such a way that these sensors show better emission control properties for reduction of NOx emission in current emission control systems.
The addition of a rhodium catalyst reduces the green effect of sensor properties, and no significant change of emission control properties is observed after 50,000 equivalent miles using the engine dynamometer durability test.
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Citation
Ogasawara, T. and Kurachi, H., "Multi Layered Zirconia Oxygen Sensor with Modified Rhodium Catalyst Electrode," SAE Technical Paper 880557, 1988, https://doi.org/10.4271/880557.Also In
References
- Higuchi, N. Mase, S. Iino A. Kato N. “Heated Zirconia Exhaust Gas Oxygen Sensor Having a Sheet-Shaped Sensing Element” SAE Paper 850382
- Flemming W. J. “Physical Principles Governing Nonideal Behavior of the Zirconia Oxygen Sensor” J. Electrochem.Soc. 124 1 21 28 1977
- Flamming W. J. “Zirconia oxygen Sensor - An Equivalent Circuit Model” SAE Paper 800020
- Broden, G. Rhodin, T. Brucker, C. Bembow R. Hurych Z. Surf.Sci. 59 593 611 1976
- Hightower J. Leirsburg D. V. “The Catalytic Chemistry of Nitrogen Oxides” Klimich R. Larson J. Plenum New York 63 90 1975