Mixed-potential-type zirconia-based NOx sensor using Rh-loaded NiO sensing electrode operating at high temperatures

Wang, Jian; Elumalai, Perumal; Terada, Daisuke; Hasei, Masaharu; Miura, Norio

doi:10.1016/j.ssi.2005.12.023

Cited by 69 publications

(60 citation statements)

References 15 publications

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“…Besides, the addition of noble metals to SE improved the NO x sensing characteristics as well. Careful selection of precious metal additives to the NiO-SE revealed that the addition of 3 wt% Rh gave a remarkable improvement in the NO 2 sensitivity [150].…”

Section: No X Sensormentioning

confidence: 99%

A review of mixed-potential type zirconia-based gas sensors

Miura

Sato

Anggraini

et al. 2014

Ionics

295

175

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A robust and reliable gas sensing device is considered as a convenient and practical solution for gas concentration monitoring that has become a mandatory requirement in different field of applications. For in situ hazardous gases detection, a mixed-potential type gas sensor has been regarded as a promising solid-state gas sensor. For the past three decades, there has been a significant progress in achieving high performance in mixed-potential type sensors. Therefore, this review is focused on reporting the development of mixedpotential type gas sensors with combined yttria-stabilized zirconia (YSZ) as the base solid electrolyte material and various classes of electrode materials for their potential utilization as a high-performance sensing electrode. The underlying sensing mechanism of a mixed-potential type YSZ-based sensor is elaborated here in detail. Transformation in design and configuration of this type of sensor is also covered in this report. In addition, recent progresses on mixed-potential type gas sensors development for detection of several target gases, such as carbon monoxide, hydrocarbons, nitrogen oxides, hydrogen, and ammonia, are reviewed. Strategies to improve the sensing characteristic, particularly gas sensitivity and selectivity, are also reported. Based on the understanding of the fundamental sensing mechanism and the requirements for high-performance gas sensors, challenges and future trends for this type of gas sensor development are discussed.

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Section: No X Sensormentioning

confidence: 99%

A review of mixed-potential type zirconia-based gas sensors

Miura

Sato

Anggraini

et al. 2014

Ionics

295

175

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“…Tungsten oxide has also been used as an electrode for NO x sensors [246,[254][255][256][257][258][259][261][262][263], some examples of which are shown in Figure 13.22 [254-259, 262, 263]. Nickel oxide has also been used as the electrode material for NO x sensors [264][265][266][267][268][269][270][271][272][273][274]. One of the advantages of NiO electrodes is the improved sensor response at high temperatures.…”

Section: Electrocatalytic Electrodesmentioning

confidence: 99%

“…One of the advantages of NiO electrodes is the improved sensor response at high temperatures. Figure 13.23 shows the sensitivities of NO x sensors with WO 3 [254][255][256][257][258][259]262] or NiO [264][265][266][267][268][269] electrodes. As shown above for CO sensors, the responses of sensors with WO 3 electrodes decrease as the temperature is increased above 600 C. The responses of sensors with NiO electrodes, however, remain high up to operating temperatures of 900 C. The response of NiO electrodes can be increased even further with the addition of ruthenium [268].…”

Section: Electrocatalytic Electrodesmentioning

confidence: 99%

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Electrochemical Sensors: Fundamentals, Key Materials, and Applications

Fergus

2009

Solid State Electrochemistry I

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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

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“…To date, there have been many reports on the mixedpotential-type sensor. (7)(8)(9)(10) For example, Miura et al reported the high sensitivity and selectivity to CO in exhaust gas atmosphere of the mixed-potential-type sensor. (11) This type of sensor has also been proposed for hydrocarbon, CO, and NO 2 , and at present, Y 2 O 3 -stabilized ZrO 2 (YSZ) is the most popular electrolyte for this type of sensor.…”

Section: Introductionmentioning

confidence: 99%

Solid Oxide Amperometric CO Sensor for Monitoring Exhaust Gas from Water Heater

Ishihara¹,

Armonat

Kadowaki

et al. 2010

Sensors and Materials

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An amperometric CO sensor using a solid oxide electrolyte was studied and it was found that the oxygen pumping current increased with increasing CO concentration when using Au(10 wt%)/In 1.9 Sn 0.1 O 3 and RuO 2 (10 wt%)/La 0.6 Sr 0.4 CoO 3 as the electrode catalysts and La 0.9 Sr 0.1 Ga 0.8 Mg 0.2 O 3 as the electrolyte. Mixed potentials are also observed on this sensor upon exposure to CO, and so changes in oxygen pumping current may be caused by the mixed potentials formed upon exposure to CO. Substitution of Ga in the LaGaO 3 electrolyte with Fe is effective for increasing the sensitivity, and this sensor is almost insensitive to CO 2 and CH 4 . As a result, it is expected that this sensor can be used for the detection of CO in exhaust gas from a small gas water heater without a fl ue line.

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Mixed-potential-type zirconia-based NOx sensor using Rh-loaded NiO sensing electrode operating at high temperatures

Cited by 69 publications

References 15 publications

A review of mixed-potential type zirconia-based gas sensors

A review of mixed-potential type zirconia-based gas sensors

Electrochemical Sensors: Fundamentals, Key Materials, and Applications

Solid Oxide Amperometric CO Sensor for Monitoring Exhaust Gas from Water Heater

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