Gas sensing behavior of palladium oxide for carbon monoxide at low working temperature

Zheng, Yangong; Qiao, Qiao; Wang, Jing; Li, Xiaogan; Jian, Jiawen

doi:10.1016/j.snb.2015.02.035

Cited by 14 publications

(6 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The chemisorption of gas molecules induces ionized intermediates or Fermi level shift on metal oxide that alter the electric potential on metal oxide electrode. This explanation is proposed in some literatures [29,31]. Possible Fig.…”

Section: Discussionmentioning

confidence: 58%

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

Zhu

Zheng

Jian

2015

Ionics

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Section: Discussionmentioning

confidence: 58%

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

Zhu

Zheng

Jian

2015

Ionics

Self Cite

View full text Add to dashboard Cite

show abstract

“…SnO 2 nanofibers, when used as nanosensors in electronic noses, have shown higher sensitivity to NO 2 when the temperature was low [ 61 ]. The temperature-dependent response of PdO showed good sensitivity to various CO concentrations at operating temperatures from 25 °C to 100 °C, because the amount of adsorption of CO varies with temperature [ 62 ]. The nanoparticles of PdO/SnO 2 has a low detection limit and good selectivity to carbon monoxide than other interfering gases, together with low-temperature stability and reversibility, clearly showing that this sensor is a practical low-temperature sensing material for CO [ 63 ].…”

Section: Resultsmentioning

confidence: 99%

Palladium-Doped Tin Oxide Nanosensor for the Detection of the Air Pollutant Carbon Monoxide Gas

Jebakumar

Juliet

2020

Sensors

View full text Add to dashboard Cite

The exhaust gases from various sources cause air pollution, which is a leading contributor to the global disease burden. Hence, it has become vital to monitor and control the increasing pollutants coming out of the various sources into the environment. This paper has designed and developed a sensor material to determine the amount of carbon monoxide (CO), which is one of the major primary air pollutants produced by human activity. Nanoparticle-based sensors have several benefits in sensitivity and specificity over sensors made from traditional materials. In this study, tin oxide (SnO2), which has greater sensitivity to the target gas, is selected as the sensing material which selectively senses only CO. Tin oxide nanoparticles have been synthesized from stannous chloride dihydrate chemical compound by chemical precipitation method. Palladium, at the concentration of 0.1%, 0.2%, and 0.3% by weight, was added to tin oxide and the results were compared. Synthesized samples were characterized by X-ray diffraction (XRD) and field emission scanning electron microscope (FESEM) techniques. XRD revealed the tetragonal structure of the SnO2 nanoparticles and FESEM analysis showed the size of the nanoparticles to be about 7–20 nm. Further, the real-time sensor testing was performed and the results proved that the tin oxide sensor, doped with 0.2% palladium, senses the CO gas more efficiently with greater sensitivity.

show abstract

“…To analyze the response and recovery time, each parameter was measured at a fixed frequency with the evolution of time. The time taken by a sensor to achieve 90% of the total parameter change is defined as response time in the case of adsorption or the recovery time in the case of desorption as shown in Figure 12a (Zheng et al, 2015;Bailly et al, 2016b). Combining both the real and imaginary parts of a parameter is considered as a powerful tool to assess the overall performance of a sensor (Rossignol et al, 2013).…”

Section: Signal Analysismentioning

confidence: 99%

“…The first process is to sense gas via physical or chemical interactions with sensitive materials, which is called the sensitive process; the second process is to transduce the interactions to signals, which is called transduction. Various transduction technologies have been employed in the gas sensors, e.g., conductometric transduction converts redox reactions of gas molecules into electrical signals (Xing et al, 2015;Wang et al, 2019); optical transduction utilizes infrared spectral characteristics of gas molecules (Babeva et al, 2017); mass transduction measures weight of gas molecules using a microbalance, and converts it to a vibration frequency signal (Tu et al, 2015;Lv et al, 2018); electrochemical transduction is based on electron transfer between electrolyte and gas molecules (Zheng et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Gas Sensing by Microwave Transduction: Review of Progress and Challenges

Zheng

Hua

et al. 2019

Front. Mater.

Self Cite

View full text Add to dashboard Cite

Microwave transduction is a novel research field in gas sensing owing to its simplicity, low cost, passive, and non-contact operations that indicate a huge potential in applications for gas sensing. At present, the study of microwave gas sensors is limited to testing the macroscopic performance of materials. Although the permittivity change of materials is the reason for microwave transduction, the knowledge of the fundamental mechanism is an urgent requirement for boosting the development of microwave gas sensors. In this review, we summarized the presented progresses of microwave gas sensors, including the performance of the different materials and propagative structures, as well as their sensitive signal. We have attempted to explain the sensitive mechanism of these materials, discuss the function of the propagative structure, and analyze the sensitive signal extracted from the parameters of electromagnetic waves. Finally, the challenges in the study of sensitive materials and propagative structures used in microwave gas sensors are analyzed. It is clear from the published literatures that microwave transduction provide a new route for gas detection, and it is expected that commercial manifestation will occur. The future research on microwave gas sensors will continue to exploit their sensitive materials and propagative structure for different applications. The understanding of the microscopic polarization interactions with gases will assist in and guide the fabrication of high-performance microwave gas sensors in the future.

show abstract

Gas sensing behavior of palladium oxide for carbon monoxide at low working temperature

Cited by 14 publications

References 32 publications

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

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

Palladium-Doped Tin Oxide Nanosensor for the Detection of the Air Pollutant Carbon Monoxide Gas

Gas Sensing by Microwave Transduction: Review of Progress and Challenges

Contact Info

Product

Resources

About