Modified Ta3N5 powder as a photocatalyst for O 2 evolution in a two-step water splitting system with an iodate/iodide shuttle redox mediator under visible light

Masashi Tabata; Kazuhiko Maeda; Masanobu Higashi; Daling Lu; Tsuyoshi Takata; Ryu Abe; Kazunari Domen

doi:10.1021/la100722w

Modified Ta₃N₅ powder as a photocatalyst for O ₂ evolution in a two-step water splitting system with an iodate/iodide shuttle redox mediator under visible light

Masashi Tabata, Kazuhiko Maeda, Masanobu Higashi, Daling Lu, Tsuyoshi Takata, Ryu Abe, Kazunari Domen

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

185 Citations (Scopus)

Abstract

Modification of tantalum nitride (Ta₃N₅), which has a band gap of 2.1 eV, with nanoparticulate iridium (Ir) and rutile titania (R-TiO₂) achieved functionality as an O₂ evolution photocatalyst in a two-step water-splitting system with an IO₃ ^-/I^- shuttle redox mediator under visible light (λ > 420 nm) in combination with a Pt/ZrO₂/TaON H₂ evolution photocatalyst. The loaded Ir nanoparticles acted as active sites to reduce IO₃ ^-/I^-, while the R-TiO₂ modifier suppressed the adsorption of I^- on Ta₃N ₅, allowing Ta₃N₅ to evolve O₂ in the two-step water-splitting system.

Original language	English
Pages (from-to)	9161-9165
Number of pages	5
Journal	Langmuir
Volume	26
Issue number	12
DOIs	https://doi.org/10.1021/la100722w
Publication status	Published - 15 Jun 2010
Externally published	Yes

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10.1021/la100722w

Cite this

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title = "Modified Ta3N5 powder as a photocatalyst for O 2 evolution in a two-step water splitting system with an iodate/iodide shuttle redox mediator under visible light",

abstract = "Modification of tantalum nitride (Ta3N5), which has a band gap of 2.1 eV, with nanoparticulate iridium (Ir) and rutile titania (R-TiO2) achieved functionality as an O2 evolution photocatalyst in a two-step water-splitting system with an IO3 -/I- shuttle redox mediator under visible light (λ > 420 nm) in combination with a Pt/ZrO2/TaON H2 evolution photocatalyst. The loaded Ir nanoparticles acted as active sites to reduce IO3 -/I-, while the R-TiO2 modifier suppressed the adsorption of I- on Ta3N 5, allowing Ta3N5 to evolve O2 in the two-step water-splitting system.",

author = "Masashi Tabata and Kazuhiko Maeda and Masanobu Higashi and Daling Lu and Tsuyoshi Takata and Ryu Abe and Kazunari Domen",

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language = "English",

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T1 - Modified Ta3N5 powder as a photocatalyst for O 2 evolution in a two-step water splitting system with an iodate/iodide shuttle redox mediator under visible light

AU - Tabata, Masashi

AU - Maeda, Kazuhiko

AU - Higashi, Masanobu

AU - Lu, Daling

AU - Takata, Tsuyoshi

AU - Abe, Ryu

AU - Domen, Kazunari

PY - 2010/6/15

Y1 - 2010/6/15

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AB - Modification of tantalum nitride (Ta3N5), which has a band gap of 2.1 eV, with nanoparticulate iridium (Ir) and rutile titania (R-TiO2) achieved functionality as an O2 evolution photocatalyst in a two-step water-splitting system with an IO3 -/I- shuttle redox mediator under visible light (λ > 420 nm) in combination with a Pt/ZrO2/TaON H2 evolution photocatalyst. The loaded Ir nanoparticles acted as active sites to reduce IO3 -/I-, while the R-TiO2 modifier suppressed the adsorption of I- on Ta3N 5, allowing Ta3N5 to evolve O2 in the two-step water-splitting system.

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