Planar NASICON-Based CO[sub 2] Sensor Using BiCuVO[sub x]/Perovskite–Type Oxide as a Solid-Reference Electrode

Kida, Tetsuya; Kishi, Shotaro; Yuasa, Masayoshi; Shimanoe, Kengo; Yamazoe, Noboru

doi:10.1149/1.2889011

Cited by 21 publications

(15 citation statements)

References 25 publications

(26 reference statements)

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“…Perovskite-type oxide La 0.6 Sr 0.4 Co 0.78 Ni 0.02 Fe 0.2 O 3 was prepared by an evaporation method. 32 The perovskite-type oxide powder was mixed with distilled water to form a paste, which was applied to one side of the GO membrane and dried at room temperature. The sensing and counter electrodes were exposed to the sample gases.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

Solid Electrolyte Gas Sensor Based on a Proton-Conducting Graphene Oxide Membrane

et al. 2017

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Graphene oxide (GO) is an ultrathin carbon nanosheet with various oxygen-containing functional groups. The utilization of GO has attracted tremendous attention in a number of areas, such as electronics, optics, optoelectronics, catalysis, and bioengineering. Here, we report the development of GO-based solid electrolyte gas sensors that can continuously detect combustible gases at low concentrations. GO membranes were fabricated by filtration using a colloidal solution containing GO nanosheets synthesized by a modified Hummers’ method. The GO membrane exposed to humid air showed good proton-conducting properties at room temperature, as confirmed by hydrogen concentration cell measurements and complex impedance analyses. Gas sensor devices were fabricated using the GO membrane fitted with a Pt/C sensing electrode. The gas-sensing properties were examined by potentiometric and amperometric techniques. The GO sensor showed high, stable, and reproducible responses to hydrogen at parts per million concentrations in humid air at room temperature. The sensing mechanism is explained in terms of the mixed-potential theory. Our results suggest the promising capability of GO for the electrochemical detection of combustible gases.

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Section: ■ Experimental Sectionmentioning

confidence: 99%

Solid Electrolyte Gas Sensor Based on a Proton-Conducting Graphene Oxide Membrane

et al. 2017

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“…This value agrees well with the theoretical value of 76.7 mV per decade, which corresponds to the reaction electron number (n) ¼ 2.0. 20,21 The EMF of the device can be expressed as a function of the logarithm of CO 2 concentration (ppm) as follows:…”

Section: Resultsmentioning

confidence: 99%

“…We previously reported that the sensor device demonstrates slight responses to water vapor and high stability even under highly humid conditions. 21,33 Thus, a small amount of water at ppm concentrations formed by the combustion of VOCs does not interfere with the sensor response. In addition, the NASICONbased sensor has been shown to have high selectivity for CO 2 without interference from present gases such as NO x , SO x , CO, ethanol, ammonia, and hydrocarbons.…”

Section: Resultsmentioning

confidence: 99%

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Preparation and measurement of standard organic gases using a diffusion method and a NASICON-based CO2 sensor combined with a combustion catalyst

et al. 2011

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“…For example, Ti þ TiH 2 is used as a reference electrode in hydrogen sensors for use in molten aluminum [125]. Humidity may cause degradation of reference electrodes, but stability can be improved by using mixed oxides, such as La 0.6 Sr 0.4 Co 0.78 Ni 0.02-Fe 0.2 O 3 [126]. The addition of mixed oxides, such as (La,Sr)MnO 3 [127], can be used to inhibit the sintering of porous electrodes, which also improves stability; the properties of such perovskites are briefly described in Chapter 9.…”

Section: Reference Electrodesmentioning

confidence: 99%

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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Planar NASICON-Based CO[sub 2] Sensor Using BiCuVO[sub x]/Perovskite–Type Oxide as a Solid-Reference Electrode

Cited by 21 publications

References 25 publications

Solid Electrolyte Gas Sensor Based on a Proton-Conducting Graphene Oxide Membrane

Solid Electrolyte Gas Sensor Based on a Proton-Conducting Graphene Oxide Membrane

Preparation and measurement of standard organic gases using a diffusion method and a NASICON-based CO2 sensor combined with a combustion catalyst

Electrochemical Sensors: Fundamentals, Key Materials, and Applications

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