Mixed potential hydrogen sensor using ZnWO4 sensing electrode

Tang, Zhaoyun; Li, Xiaogan; Yang, Jianhang; Yu, Jun; Wang, Jing; Tang, Zhenan

doi:10.1016/j.snb.2014.01.086

Cited by 40 publications

(17 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The particle size of LSCF was typically in the range of 100~200 nm. 20 Upon exposure of the sensor to hydrogen-containing atmosphere, negative EMF values were observed, which became more negative with increase of H2 concentration.…”

Section: Materials Properties and Microstructurementioning

confidence: 94%

Fast Response, Highly Sensitive and Selective Mixed-Potential H₂ Sensor Based on (La, Sr)(Cr, Fe)O_3-δ Perovskite Sensing Electrode

Jiang

2017

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

A planar mixed-potential type sensor consisting of LaSrCrFeO sensing electrode, yttria-stabilized zirconia solid electrolyte, and Pt reference electrode was developed for H detection. The sensor showed high and repeatable response with a value of -143.6 mV for 1000 ppm of H at 450 °C. The sensor response varied linearly or logarithmically with the hydrogen concentration in the range of 20-100 ppm and 100-1000 ppm of H, respectively. The response/recovery time generally decreased with increasing concentration and temperature, and reached almost steady above 300 ppm of H. Response time as short as 4 s and recovery time of 24 s were attained at 450 °C for 500 ppm. The sensor exhibited excellent selectivity to hydrogen against interference of CH, CH, CO, NO, and NH. The mixed-potential mechanism was assessed by electrochemical measurements, and the sensing behavior was discussed in relation to the reaction kinetics. The excellent H sensing performance for concentrations above 100 ppm is ascribed to the high electrocatalytic activity of the perovskite electrode to H oxidation. The inferior performance for lower H concentrations may be related with slow gas diffusion in the electrode.

show abstract

Section: Materials Properties and Microstructurementioning

confidence: 94%

Fast Response, Highly Sensitive and Selective Mixed-Potential H₂ Sensor Based on (La, Sr)(Cr, Fe)O_3-δ Perovskite Sensing Electrode

Jiang

2017

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

show abstract

“…It has been reported previously that MWO 4 (M ¼ Zn, Mn, Cd) when coupled as the sensing electrodes of the mixed-potential type sensors demonstrated high sensitivity and selectivity to hydrogen. [21][22][23] It points out that the sensing electrode using the transitional metals with partly-empty outermost d shell such as Ni, Co, and Cr in MWO 4 could have better sensitivity and selectivity to lower concentrations of hydrogen.…”

Section: -20mentioning

confidence: 99%

“…Moreover, the response and recovery time became slower compared to that without water vapor which is similar to the results reported previously. [21][22][23] This might indicate that the co-adsorbed water molecular with oxygen at the TPB could decrease the reaction rate of reaction (3) as well. The sensor would almost recover aer the water vapor was removed from the gas stream as shown in Fig.…”

Section: Sensing Propertiesmentioning

confidence: 99%

A cobalt tungstate compound sensing electrode for hydrogen detection based upon mixed-potential type sensors

Wang

et al. 2017

RSC Adv.

View full text Add to dashboard Cite

An yttria-stabilized cubic zirconia (YSZ) based mixed-potential sensor coupled with CoWO 4 as the sensing electrode was developed for hydrogen detection at elevated temperatures. The developed CoWO 4 /YSZ/Pt sensor was found to have a good sensitivity to different concentrations of hydrogen from 80 ppm to 960 ppm in a background of 10% O 2 /N 2 at 450 C. The sensor showed excellent selectivity to several possible interferents such as CO, C 3 H 8 and NO 2 . The reproducibility and signal repeatability of the sensor was examined to test the reliability of the sensor. The influence of oxygen variation and humidity in the background on the sensor response was also studied.

show abstract

“…Specifically zinc tungstate (ZnWO 4 ) have attracted attention due to its unique physical and chemical properties, possessing a high application potential in various fields, such as scintillator material 3 , photoluminescence 4 , electronic and optical properties 5 , photovoltaic property 6 , humidity sensor 7 , hydrogen sensor 8 , ether sensor 9 , photocatalyst 10 and high-power lithium-ion batteries 11 . In this work, a new application is proposed for the ZnWO 4 oxide, as support for enzymes immobilization.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Zinc Tungstate (ZnWO4) Particles by Solvo-hydrothermal Technique and their Application as Support for Inulinase Immobilization

et al. 2016

View full text Add to dashboard Cite

ZnWO 4 particles were synthesized as a single-phase by a simple and easy solvo-hydrothermal technique using water-ethylene glycol mixture as solvent, without using surfactant. Physical properties of produced particles were analyzed by X-ray diffraction (XRD), infrared spectroscopy (FTIR), surface area (BET), particles size distribution and atomic force microscopy (AFM). This material was used as support for inulinase immobilization by physical adsorption and the influence of temperature (30 and 50 o C) was evaluated. Material with mesoporous characteristic and with a surface area of 35.5 m 2 .g -1 was obtained. According to the findings, ZnWO 4 present a satisfactory inulinase adsorption, and the better result was 605 U.g -1 support at 30 o C. Therefore, ZnWO 4 particles prepared by one-step solvo/ hydrothermal route provide a new potential support for inulinase immobilization.

show abstract

Mixed potential hydrogen sensor using ZnWO4 sensing electrode

Cited by 40 publications

References 28 publications

Fast Response, Highly Sensitive and Selective Mixed-Potential H₂ Sensor Based on (La, Sr)(Cr, Fe)O_3-δ Perovskite Sensing Electrode

Fast Response, Highly Sensitive and Selective Mixed-Potential H₂ Sensor Based on (La, Sr)(Cr, Fe)O_3-δ Perovskite Sensing Electrode

A cobalt tungstate compound sensing electrode for hydrogen detection based upon mixed-potential type sensors

Preparation of Zinc Tungstate (ZnWO4) Particles by Solvo-hydrothermal Technique and their Application as Support for Inulinase Immobilization

Contact Info

Product

Resources

About

Mixed potential hydrogen sensor using ZnWO4 sensing electrode

Cited by 40 publications

References 28 publications

Fast Response, Highly Sensitive and Selective Mixed-Potential H2 Sensor Based on (La, Sr)(Cr, Fe)O3-δ Perovskite Sensing Electrode

Fast Response, Highly Sensitive and Selective Mixed-Potential H2 Sensor Based on (La, Sr)(Cr, Fe)O3-δ Perovskite Sensing Electrode

A cobalt tungstate compound sensing electrode for hydrogen detection based upon mixed-potential type sensors

Preparation of Zinc Tungstate (ZnWO4) Particles by Solvo-hydrothermal Technique and their Application as Support for Inulinase Immobilization

Contact Info

Product

Resources

About

Fast Response, Highly Sensitive and Selective Mixed-Potential H₂ Sensor Based on (La, Sr)(Cr, Fe)O_3-δ Perovskite Sensing Electrode

Fast Response, Highly Sensitive and Selective Mixed-Potential H₂ Sensor Based on (La, Sr)(Cr, Fe)O_3-δ Perovskite Sensing Electrode