Time-resolved infrared absorption study of photochemical reactions over metal oxides

Akira Yamakata; Taka aki Ishibashi; Kan Takeshita; Hiroshi Onishi

doi:10.1007/s11244-005-3826-0

Time-resolved infrared absorption study of photochemical reactions over metal oxides

Akira Yamakata, Taka aki Ishibashi, Kan Takeshita, Hiroshi Onishi

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

The ability of time-resolved IR absorption spectroscopy in tracing photochemical reactions over metal oxides was studied. The primary advantage of this method is the simultaneous detection of photoexcited electrons and chemical species. The current examples presented were TiO₂ and NaTaO₃. The efficiency of the water splitting reaction on NaTaO₃-based catalysts correlated with the quantity of electrons detected by the IR absorption. A short-lived intermediate state of 2-propanol oxidation on TiO₂ was identified by its vibrational band at 1640/cm superposed on the structureless absorption of electrons. Ru dye (N3) on a TiO₂ film was irradiated with a 532-nm light pulse to simulate dye-sensitized solar cells. The neutralization rate of dye cations and the decay rate of electrons injected in the film were quantified, leading to a three-state model, which described the relaxation of injected electrons. These results demonstrated the ability of this method in tracing photochemical kinetics over metal oxides.

Original language	English
Pages (from-to)	211-216
Number of pages	6
Journal	Topics in Catalysis
Volume	35
Issue number	3-4
DOIs	https://doi.org/10.1007/s11244-005-3826-0
Publication status	Published - Jul 2005
Externally published	Yes

Keywords

Dye-sensitized solar cell
Photocatalysis
Reaction intermediate
Reaction kinetics
TiO
Water-splitting reaction

ASJC Scopus subject areas

Catalysis
Chemistry(all)

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1007/s11244-005-3826-0

Cite this

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title = "Time-resolved infrared absorption study of photochemical reactions over metal oxides",

abstract = "The ability of time-resolved IR absorption spectroscopy in tracing photochemical reactions over metal oxides was studied. The primary advantage of this method is the simultaneous detection of photoexcited electrons and chemical species. The current examples presented were TiO2 and NaTaO3. The efficiency of the water splitting reaction on NaTaO3-based catalysts correlated with the quantity of electrons detected by the IR absorption. A short-lived intermediate state of 2-propanol oxidation on TiO2 was identified by its vibrational band at 1640/cm superposed on the structureless absorption of electrons. Ru dye (N3) on a TiO2 film was irradiated with a 532-nm light pulse to simulate dye-sensitized solar cells. The neutralization rate of dye cations and the decay rate of electrons injected in the film were quantified, leading to a three-state model, which described the relaxation of injected electrons. These results demonstrated the ability of this method in tracing photochemical kinetics over metal oxides.",

keywords = "Dye-sensitized solar cell, Photocatalysis, Reaction intermediate, Reaction kinetics, TiO, Water-splitting reaction",

author = "Akira Yamakata and Ishibashi, {Taka aki} and Kan Takeshita and Hiroshi Onishi",

note = "Funding Information: The dye-sensitized TiO2 films were prepared in Mitsubishi Chemical Corporation. The NaTaO3-based catalysts were provided by Akihiko Kudo and Hideki Kato at Tokyo Science University in a collaboration supported by Core Research for Evolutional Science and Technology (CREST) of Japan Science and Technology Agency (JST). Chi Pang assisted the authors in preparing the manuscript. The authors received financial supports of Grants-in-Aid for Scientific Research on Priority Areas (417) and Exploratory Research (15655077) from the Ministry of Education, Culture, Sports, Science and Technology of the Japanese Government.",

year = "2005",

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doi = "10.1007/s11244-005-3826-0",

language = "English",

volume = "35",

pages = "211--216",

journal = "Topics in Catalysis",

issn = "1022-5528",

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AU - Yamakata, Akira

AU - Ishibashi, Taka aki

AU - Takeshita, Kan

AU - Onishi, Hiroshi

N1 - Funding Information: The dye-sensitized TiO2 films were prepared in Mitsubishi Chemical Corporation. The NaTaO3-based catalysts were provided by Akihiko Kudo and Hideki Kato at Tokyo Science University in a collaboration supported by Core Research for Evolutional Science and Technology (CREST) of Japan Science and Technology Agency (JST). Chi Pang assisted the authors in preparing the manuscript. The authors received financial supports of Grants-in-Aid for Scientific Research on Priority Areas (417) and Exploratory Research (15655077) from the Ministry of Education, Culture, Sports, Science and Technology of the Japanese Government.

PY - 2005/7

Y1 - 2005/7

N2 - The ability of time-resolved IR absorption spectroscopy in tracing photochemical reactions over metal oxides was studied. The primary advantage of this method is the simultaneous detection of photoexcited electrons and chemical species. The current examples presented were TiO2 and NaTaO3. The efficiency of the water splitting reaction on NaTaO3-based catalysts correlated with the quantity of electrons detected by the IR absorption. A short-lived intermediate state of 2-propanol oxidation on TiO2 was identified by its vibrational band at 1640/cm superposed on the structureless absorption of electrons. Ru dye (N3) on a TiO2 film was irradiated with a 532-nm light pulse to simulate dye-sensitized solar cells. The neutralization rate of dye cations and the decay rate of electrons injected in the film were quantified, leading to a three-state model, which described the relaxation of injected electrons. These results demonstrated the ability of this method in tracing photochemical kinetics over metal oxides.

AB - The ability of time-resolved IR absorption spectroscopy in tracing photochemical reactions over metal oxides was studied. The primary advantage of this method is the simultaneous detection of photoexcited electrons and chemical species. The current examples presented were TiO2 and NaTaO3. The efficiency of the water splitting reaction on NaTaO3-based catalysts correlated with the quantity of electrons detected by the IR absorption. A short-lived intermediate state of 2-propanol oxidation on TiO2 was identified by its vibrational band at 1640/cm superposed on the structureless absorption of electrons. Ru dye (N3) on a TiO2 film was irradiated with a 532-nm light pulse to simulate dye-sensitized solar cells. The neutralization rate of dye cations and the decay rate of electrons injected in the film were quantified, leading to a three-state model, which described the relaxation of injected electrons. These results demonstrated the ability of this method in tracing photochemical kinetics over metal oxides.

KW - Dye-sensitized solar cell

KW - Photocatalysis

KW - Reaction intermediate

KW - Reaction kinetics

KW - TiO

KW - Water-splitting reaction

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Time-resolved infrared absorption study of photochemical reactions over metal oxides

Abstract

Keywords

ASJC Scopus subject areas

UN SDGs

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