Adsorptions of SO2, SOF2, and SO2F2 on Pt-modified anatase (101) surface: Sensing mechanism study

Zhang, Xiaoxing; Chen, Qinchuan; Hu, Weihua; Zhang, Jinbin

doi:10.1016/j.apsusc.2015.06.112

Cited by 13 publications

(9 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The unit of bond length is Å. The simulation results of this study are similar to those reported in literature [32]- [34]. On this basis, the reaction heat of the main reaction of three decomposition component gases were calculated as shown in Table 1.…”

Section: Simulation Analysis Of Characteristic Decomposition Composupporting

confidence: 81%

An Investigation of Negative DC Partial Discharge Decomposition of SF₆ Under Different Metal Materials

et al. 2020

View full text Add to dashboard Cite

For determine the influence of metal materials on the negative DC partial discharge (PD) decomposition of SF 6 and put forward for the method of SF 6 DC gas insulated equipment condition monitoring and fault diagnosis based on decomposed component analysis, this study investigates the decomposition characteristics of SF 6 under three common metal materials (Al, 304 stainless steel, and Cu) in gas insulated equipment by using SO 2 , SOF 2 , and SO 2 F 2 as characteristic component gases under negative DC PD. Results show that the types of metal materials have substantial effects on the negative DC PD decomposition characteristics of SF 6. The simulation results based on the first principles confirm the phenomena observed in the experiment: the amounts and generation rates of SOF 2 were the most abundant, followed by SO 2 F 2 and SO 2. The calculation based on free electron cloud and finite depth particle in a box model shows that the electron current density of field emission has the relationship with metal work function γ and electrical field E: j(0, E) ≈ (BE 2 /γ) exp(−Dγ 3/2 /E), where B and D is constants. The electron current density by field emission is inversely proportional to the work function of metal with constant electric field. The metal material with smaller work function means the greater electron current density, further promoting the decomposition of SF 6 to generate more characteristic component gases. The results can well explain the phenomena observed in the experiment, that is, the decomposition of SF 6 is the most serious under Al electrode with lowest work function, followed by 304 stainless steel, and Cu. INDEX TERMS Negative DC, metal materials, SF 6 , first principle, work function. I. INTRODUCTION With the development and trial operation of key ultra-high voltage DC (UHVDC) gas-insulated equipment, such as ± 800 and ± 1100 kV gas DC wall bushings [1]-[3], SF 6 DC gas-insulated equipment has been widely used in UHVDC power transmission projects [4], [6]. DC gas-insulated equipment has great advantages, such as simple and compact structure, light weight, and good heat dissipation [7]. However, harmful metal protrusion defects are inevitably observed in the production, transportation, installation, and operation of The associate editor coordinating the review of this manuscript and approving it for publication was Jenny Mahoney.

show abstract

Section: Simulation Analysis Of Characteristic Decomposition Composupporting

confidence: 81%

An Investigation of Negative DC Partial Discharge Decomposition of SF₆ Under Different Metal Materials

et al. 2020

View full text Add to dashboard Cite

show abstract

“…As to TiO 2 , Zhang's group [50,[110][111][112][113][114][115][116][117][118][119][120] did systemic research to explore its application in this field, from both experimental and theoretical aspects. In terms of experiment, pristine, Pt-and Audoped TiO 2 were synthesised to study their sensing property upon SO 2 , SOF 2 and SO 2 F 2 .…”

Section: Oxide Semiconducting Nanomaterialsmentioning

confidence: 99%

Nanomaterials‐based gas sensors of SF ₆ decomposed species for evaluating the operation status of high‐voltage insulation devices

et al. 2019

Self Cite

View full text Add to dashboard Cite

In recent years, many novel sensing nanomaterials were explored experimentally and theoretically as chemical gas sensors to detect sulphur hexafluoride (SF 6) decomposed species with rapid response, high sensitivity and selectivity, as well as low cost, in order to estimate and guarantee the operation status of SF 6 insulation devices. However, there has been no systemic review yet to comprehensively understand their sensing mechanism and conclude their sensing application. Such kinds of nanomaterials include traditional carbon-based materials such as carbon nanotube and graphene, metal oxides such as SnO 2 , ZnO and TiO 2 , transition metal dichalcogenides such as MoS 2 monolayer and MoTe 2 monolayer as well as graphene-like InN monolayer. A systemic review would be significant to give a profound insight into the exploration of nanomaterial-based chemical gas sensors in the field of electrical engineering and to help youth scholars first stepping in this field rapidly master the progress inside. Thus, the authors attempt to complete this review here. They are hopeful that this review could provide some guidance to fulfil such purpose in the near future, and it would be full of perspective to explore more novel nanomaterials as defect indicators in SF 6 insulated devices. Furthermore, it is their hope that this review could broaden the sensing application of admirable nanomaterials in many fields such as environmental monitoring and pollutant scavenging.

show abstract

“…The adsorptions of SO 2 , SOF 2 , and SO 2 F 2 on Pt-modified anatase (101) surface are calculated, the effect of modified Pt on the adsorption behavior of gas molecules is analyzed, and the sensing mechanism of Pt-modified TNTA is also explained clearly [27]. In this study, we improve the sensing mechanism of Pt-modified TNTA and provide a theoretical basis for the detection of SF 6 decomposition components using the TNTA gas sensor [1,28].…”

Section: Pt-doped Tio 2 Nanotubes Sensorsmentioning

confidence: 99%

“…Parts of this chapter are reproduced from Refs. [27][28] with Elsevier's permission and from Refs. [1,37] under the terms of their respective Creative Commons licenses.…”

Section: Acknowledgementsmentioning

confidence: 99%

Application of TiO2 Nanotubes Gas Sensors in Online Monitoring of SF6 Insulated Equipment

Tang¹,

Zhang²,

Xiao³

et al. 2017

Nanomaterials Based Gas Sensors for SF6 Decomposition Components Detection

Self Cite

View full text Add to dashboard Cite

Titanium dioxide nanotube arrays (TNTAs) are a typical three-dimensional nanomaterial. TNTA has rich chemical and physical properties and low manufacturing costs. Thus, TNTA has broad application prospects. In recent years, research has shown that because of its large specific surface area and nanosize effect, the TNTAs have an enormous potential for development compared with other nanostructure forms in fields such as light catalysis, sensor, and solar batteries. TNTAs have become the hotspot of international nanometer material research. The tiny gas sensor made from TNTA has several advantages, such as fast response, high sensitivity, and small size. Several scholars in this field have achieved significant progress. As a sensitive material, TNTA is used to test O 2 , NO 2 , H 2 , ethanol, and other gases. In this chapter, three SF 6 decomposed gases, namely SO 2 , SOF 2 and SO 2 F 2 , are chosen as probe gases because they are the main by-products in the decomposition of SF 6 under PD. Then, the adsorption behaviors of these gases on different anatase (101) surfaces including intrinsic, Pt-doped and Au-doped, are studied using the first principles density functional theory (DFT) calculations. The simulation results can be used as supplement for gas-sensing experiments of TNTA gas sensors. This work is expected to add insights into the fundamental understanding of interactions between gases and TNTA surfaces for better sensor design.

show abstract

Adsorptions of SO2, SOF2, and SO2F2 on Pt-modified anatase (101) surface: Sensing mechanism study

Cited by 13 publications

References 42 publications

An Investigation of Negative DC Partial Discharge Decomposition of SF₆ Under Different Metal Materials

An Investigation of Negative DC Partial Discharge Decomposition of SF₆ Under Different Metal Materials

Nanomaterials‐based gas sensors of SF ₆ decomposed species for evaluating the operation status of high‐voltage insulation devices

Application of TiO2 Nanotubes Gas Sensors in Online Monitoring of SF6 Insulated Equipment

Contact Info

Product

Resources

About

Adsorptions of SO2, SOF2, and SO2F2 on Pt-modified anatase (101) surface: Sensing mechanism study

Cited by 13 publications

References 42 publications

An Investigation of Negative DC Partial Discharge Decomposition of SF6 Under Different Metal Materials

An Investigation of Negative DC Partial Discharge Decomposition of SF6 Under Different Metal Materials

Nanomaterials‐based gas sensors of SF 6 decomposed species for evaluating the operation status of high‐voltage insulation devices

Application of TiO2 Nanotubes Gas Sensors in Online Monitoring of SF6 Insulated Equipment

Contact Info

Product

Resources

About

An Investigation of Negative DC Partial Discharge Decomposition of SF₆ Under Different Metal Materials

An Investigation of Negative DC Partial Discharge Decomposition of SF₆ Under Different Metal Materials

Nanomaterials‐based gas sensors of SF ₆ decomposed species for evaluating the operation status of high‐voltage insulation devices