Application of commercial automotive sensor manufacturing methods for NOx/NH3 mixed potential sensors for on-board emissions control

Sekhar, Praveen Kumar; Brosha, Eric L.; Mukundan, Rangachary; Li, Wenxia; Nelson, Mark A.; Palanisamy, Ponnusamy; Garzón, Fernando H.

doi:10.1016/j.snb.2009.10.045

Cited by 110 publications

(73 citation statements)

References 21 publications

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“…In order to monitor the concentration of harmful slip NH 3 , the development of a highly sensitive, selective, and stable NH 3 sensor is in a strong demand in recent years. Table 5 summarizes the typical examples of mixed-potential type YSZ-based NH 3 sensors which have been developed recently in order to satisfy these requirements and needs [57,62,121,[166][167][168][169][170][171][172][173].…”

Section: Nh 3 Sensormentioning

confidence: 99%

“…A strong acid-base interaction between SiO 2 and NH 3 was postulated to contribute for such highly selective NH 3 detection. Figure 27 summarizes and compares the NH 3 sensitivities for the several above-mentioned YSZ-based sensors [57,62,121,[166][167][168][169][170][171][172][173]. The highest NH 3 sensitivity was obtained by using the YSZ-based sensor using MoO 3 -SE operating at 500°C; the sensitivity (Δemf) was still as high as 30 mV even to 10 ppm NH 3 [167].…”

Section: Nh 3 Sensormentioning

confidence: 99%

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

Miura

Sato

Anggraini

et al. 2014

Ionics

293

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: Nh 3 Sensormentioning

confidence: 99%

Section: Nh 3 Sensormentioning

confidence: 99%

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

Miura

Sato

Anggraini

et al. 2014

Ionics

293

175

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“…Our group has previously found that sensors pairing Pt and La 0.8 Sr 0.2 CrO 3 (LSCO) have demonstrated high sensitivity to HCs at open circuit and NO x under bias [6,7]. Pt and Au or Au alloys such as Au/Pd have proven to be sensitive electrode pairs for detection of both CO and NH 3 [6,8,9]. The integration of these two types of sensing electrode pairs onto one device in principle enables the detection of all species of interest to automotive emissions.…”

Section: Introductionmentioning

confidence: 99%

Quantitative decoding of the response a ceramic mixed potential sensor array for engine emissions control and diagnostics

Tsui

Benavidez

Palanisamy³

et al. 2017

Sensors and Actuators B: Chemical

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Please cite this article in press as: L.-k. Tsui, et al., Quantitative decoding of the response a ceramic mixed potential sensor array for engine emissions control and diagnostics, Sens. Actuators B: Chem. (2017), http://dx. a b s t r a c tThe development of on-board sensors for emissions monitoring is necessary for continuous monitoring of the performance of catalytic systems in automobiles. We have fabricated mixed potential electrochemical gas sensing devices with Pt, La 0.8 Sr 0.2 CrO 3 (LSCO), and Au/Pd alloy electrodes and a porous yttria-stabilized zirconia electrolyte. The three-electrode design takes advantage of the preferential selectivity of the Pt + Au/Pd and Pt + LSCO pairs towards different species of gases and has additional tunable selectivity achieved by applying a current bias to the latter pair. Voltages were recorded in single, binary, and ternary gas streams of NO, NO 2 , C 3 H 8 , and CO. We have trained artificial neural networks to examine the voltage output from sensors in biased and unbiased modes to both identify which single test gas or binary mixture of two test gases is present in a gas stream as well as extract concentration values. We are able to identify single and binary mixtures of these gases with accuracy of at least 98%. For determining concentration, the peak in the error distribution for binary mixtures was 5% and 80% of test data fell under <12% error. The sensor stability was also evaluated over the course of over 100 days and the ability to retrain ANNs with a small dataset was demonstrated.

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“…The prototype is a thin film implementation [10] based on an electrochemical, mixed potential detection scheme using a controlled interface approach [11]. Mixed potential sensors [12] are a class of electrochemical devices, which develop a non-Nernstian electromotive force (e.m.f) due to the difference in the kinetics of the redox reactions at each electrode/ electrolyte interface upon exposure to various analytes.…”

Section: Introductionmentioning

confidence: 99%