Development of NO  sensing devices based on YSZ and oxide electrode aiming for monitoring car exhausts

Miura, Norio; Nakatou, Mitsunobu; Zhuiykov, Serge

doi:10.1016/j.ceramint.2003.12.014

Cited by 73 publications

(37 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Prior work has investigated solid-state electrochemical sensors for NO x based on yttria-stabilized zirconia (YSZ) electrolyte and an impedancemetric (sometimes referred to as impedimetric) sensing approach [9][10][11][12][13][14][15]. In contrast to the dc measurements made using amperometric (where current is measured and related to NO x concentration) or potentiometric (where voltages are measured and related to NO x concentration) approaches, the impedancemetric approach uses ac measurements at a specified frequency.…”

Section: Introductionmentioning

confidence: 99%

Diesel engine dynamometer testing of impedancemetric NO sensors

Woo

Glass

Novak

et al. 2011

Sensors and Actuators B: Chemical

View full text Add to dashboard Cite

Prototype solid-state electrochemical sensors using a dense gold sensing electrode, porous yttria-stabilized zirconia (YSZ) electrolyte, and a platinum counter electrode (Au/YSZ/Pt) were evaluated for measuring NO x (NO and NO 2 ) in diesel exhaust. Both electrodes were exposed to the test gas (i.e., there was no reference gas for the counter electrode). An impedancemetric method was used for NO x measurements, where the phase angle was used as the response signal. A portion of the tailpipe exhaust from the dynamometer test stand was extracted and fed into a furnace containing the experimental sensor. The prototype sensor was tested along with a commercially available NO x sensor. Simultaneous measurements for NO x , O 2 , CO 2 , H 2 O, CO, and CH 4 in a separate feed stream were made using Fourier transform infrared (FTIR) spectroscopy and an oxygen paramagnetic analyzer. The experimental sensor showed very good measurement capability for NO in the range of 25-250 ppm, with a response paralleling that of the FTIR and commercial sensor. The prototype sensor showed better sensitivity to NO x at the lower concentration ranges. O 2 is an interferent for the experimental sensor, resulting in decreased sensitivity for measurement of NO x . Methods to overcome this interference are discussed.

show abstract

Section: Introductionmentioning

confidence: 99%

Diesel engine dynamometer testing of impedancemetric NO sensors

Woo

Glass

Novak

et al. 2011

Sensors and Actuators B: Chemical

View full text Add to dashboard Cite

show abstract

“…As with perovskites, several chromites forming the spinel structure, including [320,327], are sensitive to NO x gas. Other spinel electrode materials include ZnFe 2 O 4 [327][328][329][330][331] and CdMn 2 O 4 [325]. The outputs of some NO x sensors with spinel electrodes are shown in Figure 13.27 [29,275,309,313,320,324,325,[327][328][329][330].…”

Section: Electrocatalytic Electrodesmentioning

confidence: 99%

“…For example, LaFeO 3 [374], Cr 2 O 3 [375], ZnCr 2 O 4 [245,320,328,376,377] and NiCr 2 O 4 [272,378] have been used in both potentiometric and impedancemetric NO x sensors, although the performance of each electrode material differs between the two types of sensor. For example, ZnCr 2 O 4 does not perform particularly well in the potentiometric mode, but is one of the best electrodes in the impedancemetric mode.…”

Section: Log [Co] (Ppm)mentioning

confidence: 99%

“…For example, ZnCr 2 O 4 does not perform particularly well in the potentiometric mode, but is one of the best electrodes in the impedancemetric mode. Some example outputs of impedancemetric NO x sensors are shown in Figure 13.31 [320,328,376,378]. Similarly, many of the electrode materials used for CO and hydrocarbon impedancemetric sensors are the same as are used for potentiometric sensors.…”

Section: Log [Co] (Ppm)mentioning

confidence: 99%

See 1 more Smart Citation

Electrochemical Sensors: Fundamentals, Key Materials, and Applications

Fergus

2009

Solid State Electrochemistry I

View full text Add to dashboard Cite

Solid electrolytes are well suited for use in chemical sensors for high-temperature applications. The first such sensors followed from the use of solid electrolytes for thermodynamic measurements, and are based on galvanic cells, for which the open circuit voltage is related to the concentration of the mobile ionic species, or to another target species through equilibration at the electrode surface. However, sensors can also be based on nonequilibrium, but steady-state, potentials established between electrochemical reactions at the electrode. Another approach is to use the current passing through the electrolyte, rather than the voltage across the electrolyte, as the sensor signal. In this chapter we first describe the different methods for using solid electrolytes in chemical sensors, and then discuss some of the materials challenges and example applications. IntroductionMore than 50 years ago, Kiukkola and Wagner [1] demonstrated that solid electrolytes couldbeusedingalvaniccellstomeasurethethermodynamicpropertiesofoxides.Those pioneering studies subsequently led to the more practical application of solid electrolytes in chemical sensors. The ionic conduction in solid electrolytes is thermally activated and thus its rate increases with increasing temperature; consequently, solid electrolytes are well suited for high-temperature applications. On the other hand, such temperature dependencealsomeansthatsensorsbasedonsolidelectrolytescanrespondsluggishlyor may be inoperable at low temperatures. However, one of the advantages of solid-state devices, such as those based on solid electrolytes, is that they can be miniaturized [2,3]. Decreasingthedevicedimensionsreducesdiffusionlengths,whichinturndecreasesthe response time and thus also the minimum operating temperature.Ionic conducting solids can be used in a variety of different types of sensor [4][5][6][7][8][9][10][11][12]. Solids forwhichthe ionicconductivity is much largerthanthe electronic conductivity can Solid State Electrochemistry I: Fundamentals, Materials and their Applications. Edited by Vladislav V. Kharton

show abstract

“…Recently, the development of a principally new type of impedance-based device using YSZ as solid electrolyte and a specific spinel-type oxide sensing electrode (SE) for NOx measurement at high temperatures allowed detecting total NOx concentrations regardless of the NO/NO2 ratio in the gas mixture [1][2][3][4][5]. This was a very valuable step in the development of NOx sensors for car exhausts.…”

Section: Introductionmentioning

confidence: 99%

Sensors measuring oxygen activity in melts: Development of impedance method for“in-situ” diagnostics and control electrolyte/liquid-metal electrode interface

Zhuiykov

2005

Ionics

View full text Add to dashboard Cite

Abstract. An impedance method for periodic "in-situ" diagnostics of the solid electrolyte/liquidmetal electrode interface during the lifespan of yttria-stabilized zirconia (YSZ)-based sensors measuring oxygen partial pressure in melts was developed. It was found that the impact of polarization effects on YSZ, stipulated by corrosive measuring environments (molten alkaline metals), is increasing with increase of the working temperature, which may lead to the appearance blocking reaction layers at the electrolyte/liquid-metal electrode interface. The proposed impedance method allows obtaining necessary information about the electrolyte/liquid-metal electrode interface and about the character and the level of polarization of the liquid-metal electrode.

show abstract

Development of NO sensing devices based on YSZ and oxide electrode aiming for monitoring car exhausts

Cited by 73 publications

References 11 publications

Diesel engine dynamometer testing of impedancemetric NO sensors

Diesel engine dynamometer testing of impedancemetric NO sensors

Electrochemical Sensors: Fundamentals, Key Materials, and Applications

Sensors measuring oxygen activity in melts: Development of impedance method for“in-situ” diagnostics and control electrolyte/liquid-metal electrode interface

Contact Info

Product

Resources

About