Reaction of CO with O adatoms on rutile TiO2(1 1 0) surfaces

K. Mitsuhara; H. Okumura; A. Visikovskiy; M. Takizawa; Y. Kido

doi:10.1016/j.cplett.2011.07.071

Reaction of CO with O adatoms on rutile TiO₂(1 1 0) surfaces

K. Mitsuhara, H. Okumura, A. Visikovskiy, M. Takizawa, Y. Kido

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12 Citations (Scopus)

Abstract

After exposing a reduced TiO₂(1 1 0) surface to an O₂ gas, the defect state seen in the band gap for the reduced surface almost disappeared, while O adatoms (O_ad) appeared on the 5-fold Ti rows. We then dosed a CO gas onto the TiO₂(1 1 0) surface oxidized by ¹⁸O₂ exposure and measured the defect state intensity and the amount of ¹⁸O by photoemission and ion scattering spectroscopy, respectively. With increasing CO dose, the defect state intensity increases, whereas the amount of ¹⁸O decreases. The results obtained clearly show the reaction of CO with O_ad probably to form CO₂.

Original language	English
Pages (from-to)	84-87
Number of pages	4
Journal	Chemical Physics Letters
Volume	513
Issue number	1-3
DOIs	https://doi.org/10.1016/j.cplett.2011.07.071
Publication status	Published - Sept 6 2011
Externally published	Yes

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)
Physical and Theoretical Chemistry

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10.1016/j.cplett.2011.07.071

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title = "Reaction of CO with O adatoms on rutile TiO2(1 1 0) surfaces",

abstract = "After exposing a reduced TiO2(1 1 0) surface to an O2 gas, the defect state seen in the band gap for the reduced surface almost disappeared, while O adatoms (Oad) appeared on the 5-fold Ti rows. We then dosed a CO gas onto the TiO2(1 1 0) surface oxidized by 18O2 exposure and measured the defect state intensity and the amount of 18O by photoemission and ion scattering spectroscopy, respectively. With increasing CO dose, the defect state intensity increases, whereas the amount of 18O decreases. The results obtained clearly show the reaction of CO with Oad probably to form CO2.",

author = "K. Mitsuhara and H. Okumura and A. Visikovskiy and M. Takizawa and Y. Kido",

note = "Funding Information: The authors would like to appreciate M. Kohyama and T. Akita, AIST for their useful comments and advices. Thanks are also due to H. Namba for his experimental support. This work was supported by the subsidies from Japan Science and Technology Agency, JST, {\textquoteleft}CREST{\textquoteright} and also from Ministry of Education, Japan, {\textquoteleft}Academic Frontier Project{\textquoteright}.",

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doi = "10.1016/j.cplett.2011.07.071",

language = "English",

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pages = "84--87",

journal = "Chemical Physics Letters",

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T1 - Reaction of CO with O adatoms on rutile TiO2(1 1 0) surfaces

AU - Mitsuhara, K.

AU - Okumura, H.

AU - Visikovskiy, A.

AU - Takizawa, M.

AU - Kido, Y.

N1 - Funding Information: The authors would like to appreciate M. Kohyama and T. Akita, AIST for their useful comments and advices. Thanks are also due to H. Namba for his experimental support. This work was supported by the subsidies from Japan Science and Technology Agency, JST, ‘CREST’ and also from Ministry of Education, Japan, ‘Academic Frontier Project’.

PY - 2011/9/6

Y1 - 2011/9/6

N2 - After exposing a reduced TiO2(1 1 0) surface to an O2 gas, the defect state seen in the band gap for the reduced surface almost disappeared, while O adatoms (Oad) appeared on the 5-fold Ti rows. We then dosed a CO gas onto the TiO2(1 1 0) surface oxidized by 18O2 exposure and measured the defect state intensity and the amount of 18O by photoemission and ion scattering spectroscopy, respectively. With increasing CO dose, the defect state intensity increases, whereas the amount of 18O decreases. The results obtained clearly show the reaction of CO with Oad probably to form CO2.

AB - After exposing a reduced TiO2(1 1 0) surface to an O2 gas, the defect state seen in the band gap for the reduced surface almost disappeared, while O adatoms (Oad) appeared on the 5-fold Ti rows. We then dosed a CO gas onto the TiO2(1 1 0) surface oxidized by 18O2 exposure and measured the defect state intensity and the amount of 18O by photoemission and ion scattering spectroscopy, respectively. With increasing CO dose, the defect state intensity increases, whereas the amount of 18O decreases. The results obtained clearly show the reaction of CO with Oad probably to form CO2.

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Reaction of CO with O adatoms on rutile TiO₂(1 1 0) surfaces

Abstract

All Science Journal Classification (ASJC) codes

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