The effect of co-catalyst for Z-scheme photocatalysis systems with an Fe3+/Fe2+ electron mediator on overall water splitting under visible light irradiation

Yasuyoshi Sasaki; Akihide Iwase; Hideki Kato; Akihiko Kudo

doi:10.1016/j.jcat.2008.07.017

The effect of co-catalyst for Z-scheme photocatalysis systems with an Fe³⁺/Fe²⁺ electron mediator on overall water splitting under visible light irradiation

Yasuyoshi Sasaki, Akihide Iwase, Hideki Kato, Akihiko Kudo

応用化学科

研究成果: Article › 査読

396 被引用数 (Scopus)

抄録

Co-catalysts loaded on SrTiO₃:Rh in visible-light-driven Z-scheme photocatalysis systems consisting of SrTiO₃:Rh for H₂ evolution, BiVO₄ for O₂ evolution, and Fe³⁺/Fe²⁺ for an electron mediator were investigated. The activity of the system using a Ru co-catalyst for overall water splitting was as high as that of the system using a Pt co-catalyst. The photocatalytic activity of the system using the Pt co-catalyst decreased as the partial pressures of evolved H₂ and O₂ were increased. In contrast, such deactivation was not observed for the system using the Ru co-catalyst. The investigation of the back-reactions revealed that water formation from H₂ and O₂, reduction of Fe³⁺ by H₂, and oxidation of Fe²⁺ by O₂ were significantly suppressed in the system using the Ru co-catalyst, resulting in good photocatalytic performance for water splitting. The (Ru/SrTiO₃:Rh)-(BiVO₄)-(Fe³⁺/Fe²⁺) photocatalysis system gave a quantum yield of 0.3% and a stable activity more than 70 h. This system was confirmed to be active for water splitting using a solar simulator.

本文言語	English
ページ（範囲）	133-137
ページ数	5
ジャーナル	Journal of Catalysis
巻	259
号	1
DOI	https://doi.org/10.1016/j.jcat.2008.07.017
出版ステータス	Published - 1 10月 2008

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10.1016/j.jcat.2008.07.017

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引用スタイル

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title = "The effect of co-catalyst for Z-scheme photocatalysis systems with an Fe3+/Fe2+ electron mediator on overall water splitting under visible light irradiation",

abstract = "Co-catalysts loaded on SrTiO3:Rh in visible-light-driven Z-scheme photocatalysis systems consisting of SrTiO3:Rh for H2 evolution, BiVO4 for O2 evolution, and Fe3+/Fe2+ for an electron mediator were investigated. The activity of the system using a Ru co-catalyst for overall water splitting was as high as that of the system using a Pt co-catalyst. The photocatalytic activity of the system using the Pt co-catalyst decreased as the partial pressures of evolved H2 and O2 were increased. In contrast, such deactivation was not observed for the system using the Ru co-catalyst. The investigation of the back-reactions revealed that water formation from H2 and O2, reduction of Fe3+ by H2, and oxidation of Fe2+ by O2 were significantly suppressed in the system using the Ru co-catalyst, resulting in good photocatalytic performance for water splitting. The (Ru/SrTiO3:Rh)-(BiVO4)-(Fe3+/Fe2+) photocatalysis system gave a quantum yield of 0.3% and a stable activity more than 70 h. This system was confirmed to be active for water splitting using a solar simulator.",

keywords = "Co-catalyst, Heterogeneous photocatalysis, Ruthenium, Solar hydrogen, Visible light, Water splitting, Z-scheme",

author = "Yasuyoshi Sasaki and Akihide Iwase and Hideki Kato and Akihiko Kudo",

note = "Funding Information: This work was supported by Core Research for Evolutional Science and Technology program of Japan Science and Technology Agency (CREST/JST), a Grant-in-Aid (14050090) for the Priority Area Research (417) from the MEXT Japan, and the Nissan Science Foundation.",

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T1 - The effect of co-catalyst for Z-scheme photocatalysis systems with an Fe3+/Fe2+ electron mediator on overall water splitting under visible light irradiation

AU - Sasaki, Yasuyoshi

AU - Iwase, Akihide

AU - Kato, Hideki

AU - Kudo, Akihiko

N1 - Funding Information: This work was supported by Core Research for Evolutional Science and Technology program of Japan Science and Technology Agency (CREST/JST), a Grant-in-Aid (14050090) for the Priority Area Research (417) from the MEXT Japan, and the Nissan Science Foundation.

PY - 2008/10/1

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N2 - Co-catalysts loaded on SrTiO3:Rh in visible-light-driven Z-scheme photocatalysis systems consisting of SrTiO3:Rh for H2 evolution, BiVO4 for O2 evolution, and Fe3+/Fe2+ for an electron mediator were investigated. The activity of the system using a Ru co-catalyst for overall water splitting was as high as that of the system using a Pt co-catalyst. The photocatalytic activity of the system using the Pt co-catalyst decreased as the partial pressures of evolved H2 and O2 were increased. In contrast, such deactivation was not observed for the system using the Ru co-catalyst. The investigation of the back-reactions revealed that water formation from H2 and O2, reduction of Fe3+ by H2, and oxidation of Fe2+ by O2 were significantly suppressed in the system using the Ru co-catalyst, resulting in good photocatalytic performance for water splitting. The (Ru/SrTiO3:Rh)-(BiVO4)-(Fe3+/Fe2+) photocatalysis system gave a quantum yield of 0.3% and a stable activity more than 70 h. This system was confirmed to be active for water splitting using a solar simulator.

AB - Co-catalysts loaded on SrTiO3:Rh in visible-light-driven Z-scheme photocatalysis systems consisting of SrTiO3:Rh for H2 evolution, BiVO4 for O2 evolution, and Fe3+/Fe2+ for an electron mediator were investigated. The activity of the system using a Ru co-catalyst for overall water splitting was as high as that of the system using a Pt co-catalyst. The photocatalytic activity of the system using the Pt co-catalyst decreased as the partial pressures of evolved H2 and O2 were increased. In contrast, such deactivation was not observed for the system using the Ru co-catalyst. The investigation of the back-reactions revealed that water formation from H2 and O2, reduction of Fe3+ by H2, and oxidation of Fe2+ by O2 were significantly suppressed in the system using the Ru co-catalyst, resulting in good photocatalytic performance for water splitting. The (Ru/SrTiO3:Rh)-(BiVO4)-(Fe3+/Fe2+) photocatalysis system gave a quantum yield of 0.3% and a stable activity more than 70 h. This system was confirmed to be active for water splitting using a solar simulator.

KW - Co-catalyst

KW - Heterogeneous photocatalysis

KW - Ruthenium

KW - Solar hydrogen

KW - Visible light

KW - Water splitting

KW - Z-scheme

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