Effects of Hydroxy Groups in Anthraquinone Dyes on Photocatalytic Activity of Visible-light-sensitized Pt-TiO2 for Hydrogen Evolution

Fumiaki Amano; Yasukazu Akaki; Akira Yamakata

doi:10.1007/s10563-022-09370-y

Effects of Hydroxy Groups in Anthraquinone Dyes on Photocatalytic Activity of Visible-light-sensitized Pt-TiO₂ for Hydrogen Evolution

Fumiaki Amano, Yasukazu Akaki, Akira Yamakata

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

1 Citation (Scopus)

Abstract

Abstract: Alizarin (1,2-dihydroxyanthraquinone) is a stable red photoredox sensitizer. We explored the effect of the hydroxy substituents of 9,10-anthraquinone (AQ) molecules on the photocatalytic hydrogen evolution over a dye-sensitized Pt-TiO₂ system under visible-light irradiation. The 2-hydroxy group in AQ dyes was necessary to induce photocatalytic H₂ evolution. By contrast, the 1-hydroxy group was the anchoring group to increase the adsorption amount of the dyes on the TiO₂ surface. Using time-resolved infrared spectroscopy, we found that the 2-hydroxy group enhances the electron injection and suppresses the back electron transfer from TiO₂ particles to the dye. Graphical Abstract: [Figure not available: see fulltext.]

Original language	English
Journal	Catalysis Surveys from Asia
DOIs	https://doi.org/10.1007/s10563-022-09370-y
Publication status	Accepted/In press - 2022

Keywords

Dye-sensitized photocatalyst
Hydrogen evolution reaction
Organic dye
Titanium dioxide
Visible-light-driven photocatalyst

ASJC Scopus subject areas

Catalysis
Chemistry(all)

Access to Document

10.1007/s10563-022-09370-y

Cite this

@article{c87812013be947b6ab15207f1b8ae79d,

title = "Effects of Hydroxy Groups in Anthraquinone Dyes on Photocatalytic Activity of Visible-light-sensitized Pt-TiO2 for Hydrogen Evolution",

abstract = "Abstract: Alizarin (1,2-dihydroxyanthraquinone) is a stable red photoredox sensitizer. We explored the effect of the hydroxy substituents of 9,10-anthraquinone (AQ) molecules on the photocatalytic hydrogen evolution over a dye-sensitized Pt-TiO2 system under visible-light irradiation. The 2-hydroxy group in AQ dyes was necessary to induce photocatalytic H2 evolution. By contrast, the 1-hydroxy group was the anchoring group to increase the adsorption amount of the dyes on the TiO2 surface. Using time-resolved infrared spectroscopy, we found that the 2-hydroxy group enhances the electron injection and suppresses the back electron transfer from TiO2 particles to the dye. Graphical Abstract: [Figure not available: see fulltext.]",

keywords = "Dye-sensitized photocatalyst, Hydrogen evolution reaction, Organic dye, Titanium dioxide, Visible-light-driven photocatalyst",

author = "Fumiaki Amano and Yasukazu Akaki and Akira Yamakata",

note = "Funding Information: This work was supported by JSPS KAKENHI [grant numbers JP23655187, JP23686114, JP20H02525, and JP20H05838]. Publisher Copyright: {\textcopyright} 2022, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.",

year = "2022",

doi = "10.1007/s10563-022-09370-y",

language = "English",

journal = "Catalysis Surveys from Asia",

issn = "1571-1013",

publisher = "Springer New York",

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T1 - Effects of Hydroxy Groups in Anthraquinone Dyes on Photocatalytic Activity of Visible-light-sensitized Pt-TiO2 for Hydrogen Evolution

AU - Amano, Fumiaki

AU - Akaki, Yasukazu

AU - Yamakata, Akira

N1 - Funding Information: This work was supported by JSPS KAKENHI [grant numbers JP23655187, JP23686114, JP20H02525, and JP20H05838]. Publisher Copyright: © 2022, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.

PY - 2022

Y1 - 2022

N2 - Abstract: Alizarin (1,2-dihydroxyanthraquinone) is a stable red photoredox sensitizer. We explored the effect of the hydroxy substituents of 9,10-anthraquinone (AQ) molecules on the photocatalytic hydrogen evolution over a dye-sensitized Pt-TiO2 system under visible-light irradiation. The 2-hydroxy group in AQ dyes was necessary to induce photocatalytic H2 evolution. By contrast, the 1-hydroxy group was the anchoring group to increase the adsorption amount of the dyes on the TiO2 surface. Using time-resolved infrared spectroscopy, we found that the 2-hydroxy group enhances the electron injection and suppresses the back electron transfer from TiO2 particles to the dye. Graphical Abstract: [Figure not available: see fulltext.]

AB - Abstract: Alizarin (1,2-dihydroxyanthraquinone) is a stable red photoredox sensitizer. We explored the effect of the hydroxy substituents of 9,10-anthraquinone (AQ) molecules on the photocatalytic hydrogen evolution over a dye-sensitized Pt-TiO2 system under visible-light irradiation. The 2-hydroxy group in AQ dyes was necessary to induce photocatalytic H2 evolution. By contrast, the 1-hydroxy group was the anchoring group to increase the adsorption amount of the dyes on the TiO2 surface. Using time-resolved infrared spectroscopy, we found that the 2-hydroxy group enhances the electron injection and suppresses the back electron transfer from TiO2 particles to the dye. Graphical Abstract: [Figure not available: see fulltext.]

KW - Dye-sensitized photocatalyst

KW - Hydrogen evolution reaction

KW - Organic dye

KW - Titanium dioxide

KW - Visible-light-driven photocatalyst

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