Pressure dependence of electron- and hole-consuming reactions in photocatalytic water splitting on Pt/TiO2 studied by time-resolved IR absorption spectroscopy
The decay kinetics of photogenerated electrons in the water splitting reaction on a Pt/TiO2 photocatalyst was studied by time-resolved IR absorption spectroscopy. The decay of the photogenerated electrons within 2 μs was decelerated when the catalyst was exposed to water vapor. The holes were consum...
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| Format: | Article |
| Language: | English |
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Wiley
2003-01-01
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| Series: | International Journal of Photoenergy |
| Online Access: | http://dx.doi.org/10.1155/S1110662X03000047 |
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| author | Akira Yamakata Taka-aki Ishibashi Hiroshi Onishi |
| author_facet | Akira Yamakata Taka-aki Ishibashi Hiroshi Onishi |
| author_sort | Akira Yamakata |
| collection | DOAJ |
| description | The decay kinetics of photogenerated electrons in the water splitting reaction on a Pt/TiO2 photocatalyst was studied by time-resolved IR absorption spectroscopy. The decay of the photogenerated
electrons within 2 μs was decelerated when the catalyst was exposed to water vapor. The holes were consumed
by the reaction with water instead of by the recombination with the electrons. On the other hand,
the decay at 10–900 μs was accelerated by the exposure. The electrons were consumed by the reaction with
water. The rate of the hole-consuming reaction was independent of the pressure of water vapor, whereas
that of the electron-consuming reaction increased with the pressure from 1 to 10 Torr. The different pressure
dependences indicate different reactants involved in the oxidative and reductive reactants. |
| format | Article |
| id | doaj-art-a073eaba7b57419ba3296f059f335d53 |
| institution | Kabale University |
| issn | 1110-662X |
| language | English |
| publishDate | 2003-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Photoenergy |
| spelling | doaj-art-a073eaba7b57419ba3296f059f335d532025-02-03T01:03:49ZengWileyInternational Journal of Photoenergy1110-662X2003-01-01517910.1155/S1110662X03000047Pressure dependence of electron- and hole-consuming reactions in photocatalytic water splitting on Pt/TiO2 studied by time-resolved IR absorption spectroscopyAkira Yamakata0Taka-aki Ishibashi1Hiroshi Onishi2Surface Chemistry Laboratory, Kanagawa Academy of Science and Technology (KAST), KSP East 404, 3-2-1 Sakado, Takatsu, Kawasaki 213-0012, JapanSurface Chemistry Laboratory, Kanagawa Academy of Science and Technology (KAST), KSP East 404, 3-2-1 Sakado, Takatsu, Kawasaki 213-0012, JapanSurface Chemistry Laboratory, Kanagawa Academy of Science and Technology (KAST), KSP East 404, 3-2-1 Sakado, Takatsu, Kawasaki 213-0012, JapanThe decay kinetics of photogenerated electrons in the water splitting reaction on a Pt/TiO2 photocatalyst was studied by time-resolved IR absorption spectroscopy. The decay of the photogenerated electrons within 2 μs was decelerated when the catalyst was exposed to water vapor. The holes were consumed by the reaction with water instead of by the recombination with the electrons. On the other hand, the decay at 10–900 μs was accelerated by the exposure. The electrons were consumed by the reaction with water. The rate of the hole-consuming reaction was independent of the pressure of water vapor, whereas that of the electron-consuming reaction increased with the pressure from 1 to 10 Torr. The different pressure dependences indicate different reactants involved in the oxidative and reductive reactants.http://dx.doi.org/10.1155/S1110662X03000047 |
| spellingShingle | Akira Yamakata Taka-aki Ishibashi Hiroshi Onishi Pressure dependence of electron- and hole-consuming reactions in photocatalytic water splitting on Pt/TiO2 studied by time-resolved IR absorption spectroscopy International Journal of Photoenergy |
| title | Pressure dependence of electron- and hole-consuming reactions in photocatalytic water splitting on Pt/TiO2 studied by time-resolved IR absorption spectroscopy |
| title_full | Pressure dependence of electron- and hole-consuming reactions in photocatalytic water splitting on Pt/TiO2 studied by time-resolved IR absorption spectroscopy |
| title_fullStr | Pressure dependence of electron- and hole-consuming reactions in photocatalytic water splitting on Pt/TiO2 studied by time-resolved IR absorption spectroscopy |
| title_full_unstemmed | Pressure dependence of electron- and hole-consuming reactions in photocatalytic water splitting on Pt/TiO2 studied by time-resolved IR absorption spectroscopy |
| title_short | Pressure dependence of electron- and hole-consuming reactions in photocatalytic water splitting on Pt/TiO2 studied by time-resolved IR absorption spectroscopy |
| title_sort | pressure dependence of electron and hole consuming reactions in photocatalytic water splitting on pt tio2 studied by time resolved ir absorption spectroscopy |
| url | http://dx.doi.org/10.1155/S1110662X03000047 |
| work_keys_str_mv | AT akirayamakata pressuredependenceofelectronandholeconsumingreactionsinphotocatalyticwatersplittingonpttio2studiedbytimeresolvedirabsorptionspectroscopy AT takaakiishibashi pressuredependenceofelectronandholeconsumingreactionsinphotocatalyticwatersplittingonpttio2studiedbytimeresolvedirabsorptionspectroscopy AT hiroshionishi pressuredependenceofelectronandholeconsumingreactionsinphotocatalyticwatersplittingonpttio2studiedbytimeresolvedirabsorptionspectroscopy |