The effect of La2CuO4 sensing electrode thickness on a potentiometric NOx sensor response

Macam, Eric R.; Blackburn, Bryan M.; Wachsman, Eric D.

doi:10.1016/j.snb.2011.05.014

Cited by 43 publications

(13 citation statements)

References 12 publications

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“…In 1996 and 1997, Sorita and Kawano have also reported the YSZ-based sensor using various mixed oxides (e.g., perovskite and spinel) as SE coated with an Al 2 O 3 (+Pt) catalyst layer for selective detection of CO (or H 2 ) [49,50]. Since then, substantial development of this type of gas sensors has been achieved early in this century by many leading research groups in the world [51][52][53][54][55][56][57][58][59][60][61][62][63][64].…”

Section: Introductionmentioning

confidence: 99%

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

Miura

Sato

Anggraini

et al. 2014

Ionics

299

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: Introductionmentioning

confidence: 99%

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

Miura

Sato

Anggraini

et al. 2014

Ionics

299

175

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“…The thickness of sensing electrode is supposed to have a significant effect on the sensing performance of potentiometric sensor [20]. The average response to 100 ppm CO is calculated from ten sensors of sensor-A and sensor-B at different temperatures in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…It was found that the mixed potential strongly depends on the electrode material because of catalytic and kinetics factors [6,20,28]. According to mixed potential theory, the target gases should diffuse through sensing electrode material and reach to TPB, then react with oxygen ions from electrolyte.…”

Section: Discussionmentioning

confidence: 99%

Effect of palladium oxide electrode on potentiometric sensor response to carbon monoxide

Zhu

Zheng

Jian

2015

Ionics

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This study aims to explore the potential merits of palladium oxide sensing electrode. PdO is applied on a solidstate potentiometric sensor on an yttria-stabilized zirconia (YSZ) electrolyte as sensing electrode for the first time. The physical properties, morphology, chemical properties, and sensing performance of synthetic PdO electrode are characterized. An attractive phenomenon is observed that the thicknesses of PdO electrode have a little impact on the sensor response. The sensing mechanism is discussed regarding to the impedance analysis and sensing results of the sensor. We find that the change of electric potential of the sensor in CO environment is irrelevant to mobile oxygen in electrolyte, and the charged intermediate on the PdO is proposed to contribute the sensor signal. In addition, the response of sensor depends logarithmically on the concentrations of CO, and the slope is −33.4 mV/decade.

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“…The This supports the mixed-potential mechanism of the electrochemical gas sensors reported by researchers. The slope of the semilog plot is defined as the sensitivity for the gas sensor [13,14] . By the linear fittings, the slopes of the response curves were 71.9 mV/decade, 27.7mV/decade and 17.0mV/decade for the VWT electrodes of 9.8μm, 15.2μm and 24.5μm respectively.…”

Section: The Influence Of Electrode Thickness On Nh3 Sensitivitymentioning

confidence: 99%

The effect of V₂O₅-WO₃-TiO₂ electrode thickness on ammonia sensing properties for potentiometric sensor

Wang

Yang

et al. 2018

MATEC Web Conf.

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Abstract. SCR catalyst V2O5-WO3-TiO2 was synthesized for fabricating sensing electrodes of potentiometric ammonia sensor in this work. As an important sensing electrode structural parameter, the influence of the electrode thickness on sensor properties was investigated. The VWT electrodes with the thickness of 9.8, 15.2 and 24.5μm were made by different screen printing frequency. As the thickness increased, the NH3 sensitivity of the sensor decreased from 71.9 to 17.0 mV/decade, and the response/recovery rates also slowed down rapidly. Considering the EIS results, it is believed that with the increase of electrode thickness, more NH3 molecules are consumed by catalytic reactions in VWT electrode, which reduces the concentration of NH3 involved in the electrode reaction at the three phase boundary. The weakened reaction reduces the NH3 sensitivity and increases the interface resistance of the TPB. The increased VWT thickness retards the diffusion of NH3 molecules, and finally prolongs the response/recovery times.

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The effect of La2CuO4 sensing electrode thickness on a potentiometric NOx sensor response

Cited by 43 publications

References 12 publications

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

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

Effect of palladium oxide electrode on potentiometric sensor response to carbon monoxide

The effect of V₂O₅-WO₃-TiO₂ electrode thickness on ammonia sensing properties for potentiometric sensor

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The effect of La2CuO4 sensing electrode thickness on a potentiometric NOx sensor response

Cited by 43 publications

References 12 publications

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

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

Effect of palladium oxide electrode on potentiometric sensor response to carbon monoxide

The effect of V2O5-WO3-TiO2 electrode thickness on ammonia sensing properties for potentiometric sensor

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The effect of V₂O₅-WO₃-TiO₂ electrode thickness on ammonia sensing properties for potentiometric sensor