2013 Fiscal Year Final Research Report
Surface Local Structure Dependence of Consumption Process of Photogenerated Holes on TiO2 Single Crystal Electrode in Aqueous Solution
| Project/Area Number |
23350065
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Functional materials chemistry
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| Research Institution | Osaka University |
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Principal Investigator |
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| Project Period (FY) |
2011-04-01 – 2014-03-31
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| Keywords | 光触媒 / 水分解 / 酸化チタン / メカニズム / 単結晶 / 電気化学 |
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| Research Abstract |
We investigated the surface local structure dependence of four competitive reactions (oxygen evolution reaction, photoluminescence (PL), surface roughening and non-radiative recombination) on TiO2 surface using atomically flat TiO2 (rutile) single crystal electrode those step-terrace structure was strictly controlled. It was revealed that the ratio of the quantum efficiency of four kinds of reactions strongly depends on the surface local structure such as step-terrace structure. On the other hand, it was revealed that the surface roughening process induced the change in the ratio of quantum efficiency of four kinds of competitive reactions, leading to the increase of the photocatalytic activity for oxygen photoevolution due to the generation of new surface sites where the activation energy for O2 evolution was relatively small.
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[Journal Article] Physicochemical properties of 1-alkyl-3-methylimidazolium chloride-urea melts2013
Author(s)
Tetsuya Tsuda, Koshiro Kondo, Masahiro Baba, Shotaro Suwa, Yuichi Ikeda, Taiki Sakamoto, Satoshi Seino, Hiroyuki Yoshida, Masanori Ozaki, Akihito Imanishi, Susumu Kuwabata
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Journal Title
Electrochimica Acta
Volume: 100
Pages: 285-292
DOI
Peer Reviewed
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