Adsorption and gas -sensing properties of Pt 2?GaNNTs for SF 6 decomposition products

被引：72

作者：

Cao, Wenhai ^{[1
]}

Gui, Yingang ^{[1
]}

Chen, Tao ^{[2
]}

Xu, Lingna ^{[1
]}

Ding, Zhuyu ^{[1
]}

机构：

[1] Southwest Univ, Coll Engn & Technol, Chongqing 400715, Peoples R China

[2] State Grid Chongqing Beibei Power Supply Co, Chongqing 400711, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2020年 / 524卷

基金：

中国国家自然科学基金;

关键词：

PARTIAL DISCHARGE; SULFUR-HEXAFLUORIDE; WATER-VAPOR; COMPONENTS; MOLECULES; MIXTURES; BEHAVIOR; SURFACE; SWCNTS; POINT;

D O I：

10.1016/j.apsusc.2020.146570

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Partial electric discharge faults in gas-insulated switchgear (GIS) seriously affect the operational stability of power systems. In this study, H2S, SO2, SO2F2, and SOF2 were selected as characteristic SF6 decomposition products to characterize the partial electric discharge faults in a GIS. Pt cluster-modified gallium nitride nanotubes (Pt2–GaNNTs) were selected as the gas-sensing material to study their adsorption and gas-sensing performance for SF6 decomposition products H2S, SO2, SO2F2, and SOF2. Calculation results showed that Pt2 clusters presented stable doping structures on GaNNTs that greatly enhanced the surface activity for gas adsorption. The adsorption structures, adsorption energy, charge transfer, energy band, density of states, and molecular orbit were analyzed on the basis of density functional theory. Gas molecules formed stable structures on the surfaces of Pt2–GaNNTs through chemical adsorption. The order of adsorption ability was SO2 > H2S > SOF2 > SO2F2, and that of gas-sensing ability was SOF2 > SO2 > H2S > SO2F2. In this article, a new method to detect the partial electric discharge in GIS is proposed. The proposed method helps enhance the running stability of GIS. © 2020 Elsevier B.V.

引用

页数：7

共 52 条

[1] THE FORMATION OF NEGATIVE IONS OF SULFUR HEXAFLUORIDE [J].

AHEARN, AJ ;

HANNAY, NB .

JOURNAL OF CHEMICAL PHYSICS, 1953, 21 (01) :119-124

[2] CONDUCTOMETRIC PULSE RADIOLYSIS OF SULFUR HEXAFLUORIDE IN AQUEOUS SOLUTIONS - RATE OF HYDROLYSIS OF SULFUR TETRAFLUORIDE [J].

ASMUS, KD ;

GRUNBEIN, W ;

FENDLER, JH .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1970, 92 (09) :2625-&

[3] INFLUENCE OF DISCHARGE PRODUCTION CONDITIONS, GAS-PRESSURE, CURRENT INTENSITY AND VOLTAGE TYPE, ON SF6 DISSOCIATION UNDER POINT PLANE CORONA DISCHARGES [J].

BELARBI, A ;

PRADAYROL, C ;

CASANOVAS, J ;

CASANOVAS, AM .

JOURNAL OF APPLIED PHYSICS, 1995, 77 (04) :1398-1406

[4] SF6 DECOMPOSITION UNDER POWER ARCS - PHYSICAL ASPECTS [J].

BELMADANI, B ;

CASANOVAS, J ;

CASANOVAS, AM ;

GROB, R ;

MATHIEU, J .

IEEE TRANSACTIONS ON ELECTRICAL INSULATION, 1991, 26 (06) :1163-1176

[5] Influence of reactive SFx gases on electrode surfaces after electrical discharges under SF6 atmosphere [J].

Beyer, C ;

Jenett, H ;

Klockow, D .

IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION, 2000, 7 (02) :234-240

[6]

BEYER M, 1977, ELEKTROTECH Z AUSG A, V98, P300

[7] Decomposition products from negative and 50 Hz ac corona discharges in compressed SF6 and SF6/N2 (10:90) mixtures.: Effect of water vapour added to the gas [J].

Casanovas, AM ;

Coll, I ;

Casanovas, J .

JOURNAL OF PHYSICS D-APPLIED PHYSICS, 1999, 32 (14) :1681-1692

[8] Asymmetric phase modulation of acoustic waves through unidirectional metasurfaces [J].

Chen, Di-Chao ;

Zhu, Xing-Feng ;

Wei, Qi ;

Wu, Da-Jian ;

Liu, Xiao-Jun .

APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 2018, 124 (01)

[9] Adsorption of toxic gas molecules on pristine and transition metal doped hexagonal GaN monolayer: A first-principles study [J].

Chen, Guo-Xiang ;

Li, Han-Fei ;

Wang, Dou-Dou ;

Li, Si-Qi ;

Fan, Xiao-Bo ;

Zhang, Jian-Min .

VACUUM, 2019, 165 :35-45

[10]

Chen Q.A., 2011, APPL PHYS LETT, V98, P3

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