Photocatalytic activities of graphitic carbon nitride powder for water reduction and oxidation under visible light

Kazuhiko Maeda; Xinchen Wang; Yasushi Nishihara; Daling Lu; Markus Antonietti; Kazunari Domen

doi:10.1021/jp809119m

Photocatalytic activities of graphitic carbon nitride powder for water reduction and oxidation under visible light

Kazuhiko Maeda, Xinchen Wang, Yasushi Nishihara, Daling Lu, Markus Antonietti, Kazunari Domen

Research Institute for Interdisciplinary Science

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

700 Citations (Scopus)

Abstract

Graphitic carbon nitride (g-C₃N₄) with a band gap of 2.7 eV is studied as a nonmetallic photocatalyst for H₂ or O ₂ evolution from water under ultraviolet (UV) and visible light. The g-C₃N₄ catalyst exhibits activities for water reduction into H₂ or water oxidation into O₂ in the presence of a proper sacrificial electron donor or acceptor, respectively, even without the need for precious metal cocatalysts. When bis(1,5-cyclooctadiene) platinum complex [Pt(cod)₂] (a nonionic complex) is used as a precursor of Pt cocatalyst instead of H₂PtCl₆ (an ionic complex), enhanced H₂ evolution activity is acquired. This difference in activity is primarily due to the better dispersion of Pt nanoparticles on g-C ₃N₄, which is considered to originate from the better access of Pt(cod)₂ to the g-C₃N₄ surface, as compared to that of H₂PtCl₆ in the preparation process. Unmodified g-C₃N₄ produces O₂ from an aqueous silver nitrate solution upon UV irradiation (λ > 300 nm), although N₂ release due to self-decomposition of g-C₃N₄ by photogenerated holes takes place. Modification of g-C₃N ₄ with RuO₂ improves not only O₂ evolution activity but also stability against the self-decomposition, resulting in stable visible-light-driven O₂ evolution (λ > 420 nm).

Original language	English
Pages (from-to)	4940-4947
Number of pages	8
Journal	Journal of Physical Chemistry C
Volume	113
Issue number	12
DOIs	https://doi.org/10.1021/jp809119m
Publication status	Published - Mar 26 2009

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Energy(all)
Physical and Theoretical Chemistry
Surfaces, Coatings and Films

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title = "Photocatalytic activities of graphitic carbon nitride powder for water reduction and oxidation under visible light",

abstract = "Graphitic carbon nitride (g-C3N4) with a band gap of 2.7 eV is studied as a nonmetallic photocatalyst for H2 or O 2 evolution from water under ultraviolet (UV) and visible light. The g-C3N4 catalyst exhibits activities for water reduction into H2 or water oxidation into O2 in the presence of a proper sacrificial electron donor or acceptor, respectively, even without the need for precious metal cocatalysts. When bis(1,5-cyclooctadiene) platinum complex [Pt(cod)2] (a nonionic complex) is used as a precursor of Pt cocatalyst instead of H2PtCl6 (an ionic complex), enhanced H2 evolution activity is acquired. This difference in activity is primarily due to the better dispersion of Pt nanoparticles on g-C 3N4, which is considered to originate from the better access of Pt(cod)2 to the g-C3N4 surface, as compared to that of H2PtCl6 in the preparation process. Unmodified g-C3N4 produces O2 from an aqueous silver nitrate solution upon UV irradiation (λ > 300 nm), although N2 release due to self-decomposition of g-C3N4 by photogenerated holes takes place. Modification of g-C3N 4 with RuO2 improves not only O2 evolution activity but also stability against the self-decomposition, resulting in stable visible-light-driven O2 evolution (λ > 420 nm).",

author = "Kazuhiko Maeda and Xinchen Wang and Yasushi Nishihara and Daling Lu and Markus Antonietti and Kazunari Domen",

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T1 - Photocatalytic activities of graphitic carbon nitride powder for water reduction and oxidation under visible light

AU - Maeda, Kazuhiko

AU - Wang, Xinchen

AU - Nishihara, Yasushi

AU - Lu, Daling

AU - Antonietti, Markus

AU - Domen, Kazunari

PY - 2009/3/26

Y1 - 2009/3/26

N2 - Graphitic carbon nitride (g-C3N4) with a band gap of 2.7 eV is studied as a nonmetallic photocatalyst for H2 or O 2 evolution from water under ultraviolet (UV) and visible light. The g-C3N4 catalyst exhibits activities for water reduction into H2 or water oxidation into O2 in the presence of a proper sacrificial electron donor or acceptor, respectively, even without the need for precious metal cocatalysts. When bis(1,5-cyclooctadiene) platinum complex [Pt(cod)2] (a nonionic complex) is used as a precursor of Pt cocatalyst instead of H2PtCl6 (an ionic complex), enhanced H2 evolution activity is acquired. This difference in activity is primarily due to the better dispersion of Pt nanoparticles on g-C 3N4, which is considered to originate from the better access of Pt(cod)2 to the g-C3N4 surface, as compared to that of H2PtCl6 in the preparation process. Unmodified g-C3N4 produces O2 from an aqueous silver nitrate solution upon UV irradiation (λ > 300 nm), although N2 release due to self-decomposition of g-C3N4 by photogenerated holes takes place. Modification of g-C3N 4 with RuO2 improves not only O2 evolution activity but also stability against the self-decomposition, resulting in stable visible-light-driven O2 evolution (λ > 420 nm).

AB - Graphitic carbon nitride (g-C3N4) with a band gap of 2.7 eV is studied as a nonmetallic photocatalyst for H2 or O 2 evolution from water under ultraviolet (UV) and visible light. The g-C3N4 catalyst exhibits activities for water reduction into H2 or water oxidation into O2 in the presence of a proper sacrificial electron donor or acceptor, respectively, even without the need for precious metal cocatalysts. When bis(1,5-cyclooctadiene) platinum complex [Pt(cod)2] (a nonionic complex) is used as a precursor of Pt cocatalyst instead of H2PtCl6 (an ionic complex), enhanced H2 evolution activity is acquired. This difference in activity is primarily due to the better dispersion of Pt nanoparticles on g-C 3N4, which is considered to originate from the better access of Pt(cod)2 to the g-C3N4 surface, as compared to that of H2PtCl6 in the preparation process. Unmodified g-C3N4 produces O2 from an aqueous silver nitrate solution upon UV irradiation (λ > 300 nm), although N2 release due to self-decomposition of g-C3N4 by photogenerated holes takes place. Modification of g-C3N 4 with RuO2 improves not only O2 evolution activity but also stability against the self-decomposition, resulting in stable visible-light-driven O2 evolution (λ > 420 nm).

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Photocatalytic activities of graphitic carbon nitride powder for water reduction and oxidation under visible light

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