Formation and diffusion of oxygen-vacancy pairs on TiO2(110)-(1 x 1)

被引：51

作者：

Cui, Xuefeng ^{[1
]}

Wang, Bing ^{[1
]}

Wang, Zhuo ^{[1
]}

Huang, Tian ^{[1
]}

Zhao, Yan ^{[1
]}

Yang, Jinlong ^{[1
]}

Hou, J. G. ^{[1
]}

机构：

[1] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China

来源：

JOURNAL OF CHEMICAL PHYSICS | 2008年 / 129卷 / 04期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1063/1.2955448

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：

We present the measurements for the diffusion of bridging oxygen vacancy (OV) crossover Ti rows via OV pairs (OVPs). Using a high-resolution scanning tunneling microscope (STM), we show that the OVs can be moved along the bridging oxygen rows driven by the STM tip at voltages higher than 3.0 V on TiO2(110)-(1x1) surface. It is found that the combination of OVPs leads to the formation of OVPs, which can diffuse crossover Ti rows under the mediation of OVs in adjacent bridging oxygen rows. The deduced diffusion activation energy for the diffusive OVPs from experiments is in agreement with first-principles calculations. The reaction activation energy of the OVPs with O-2 is lower than that of the OVs by 82 meV. (C) 2008 American Institute of Physics.

引用

收藏

页数：8

相关论文

共 33 条

[1] Direct visualization of defect-mediated dissociation of water on TiO2(110) [J].

Bikondoa, O ;

Pang, CL ;

Ithnin, R ;

Muryn, CA ;

Onishi, H ;

Thornton, G .

NATURE MATERIALS, 2006, 5 (03) :189-192

[2] The effect of size-dependent nanoparticle energetics on catalyst sintering [J].

Campbell, CT ;

Parker, SC ;

Starr, DE .

SCIENCE, 2002, 298 (5594) :811-814

[3] Scanning tunneling microscopy image simulation of the rutile, (110) TiO2 surface with hybrid functionals and the localized basis set approach [J].

Di Valentin, Cristiana .

JOURNAL OF CHEMICAL PHYSICS, 2007, 127 (15)

[4] Electronic structure of defect states in hydroxylated and reduced rutile TiO2(110) surfaces [J].

Di Valentin, Cristiana ;

Pacchioni, Gianfranco ;

Selloni, Annabella .

PHYSICAL REVIEW LETTERS, 2006, 97 (16)

[5] The surface science of titanium dioxide [J].

Diebold, U .

SURFACE SCIENCE REPORTS, 2003, 48 (5-8) :53-229

[6] Transient mobility of oxygen adatoms upon O2 dissociation on reduced TiO2(110) [J].

Du, Yingge ;

Dohnalek, Zdenek ;

Lyubinetsky, Igor .

JOURNAL OF PHYSICAL CHEMISTRY C, 2008, 112 (07) :2649-2653

[7] Electron-induced oxygen desorption from the TiO2(011)-2x1 surface leads to self-organized vacancies [J].

Dulub, Olga ;

Batzill, Matthias ;

Solovev, Sergey ;

Loginova, Elena ;

Alchagirov, Alim ;

Madey, Theodore E. ;

Diebold, Ulrike .

SCIENCE, 2007, 317 (5841) :1052-1056

[8] Evidence for oxygen adatoms on TiO2(110) resulting from O2 dissociation at vacancy sites [J].

Epling, WS ;

Peden, CHF ;

Henderson, MA ;

Diebold, U .

SURFACE SCIENCE, 1998, 412-13 :333-343

[9] Oxygen vacancies in transition metal and rare earth oxides: Current state of understanding and remaining challenges [J].

Ganduglia-Pirovano, M. Veronica ;

Hofmann, Alexander ;

Sauer, Joachim .

SURFACE SCIENCE REPORTS, 2007, 62 (06) :219-270

[10] Photoelectrochemical cells [J].

Grätzel, M .

NATURE, 2001, 414 (6861) :338-344

← 1 2 3 4 →