In situ XAFS study of the photoinduced potent ial shift of a MnOx cocatalyst on a SrTiO3 photocatalyst

Masaaki Yoshida; Narihiro Gon; Saaya Maeda; Takehiro Mineo; Kiyofumi Nitta; Kazuo Kato; Hiroaki Nitani; Hitoshi Abe; Tomoya Uruga; Hiroshi Kondoh

doi:10.1246/cl.140666

In situ XAFS study of the photoinduced potent ial shift of a MnO_x cocatalyst on a SrTiO₃ photocatalyst

Masaaki Yoshida, Narihiro Gon, Saaya Maeda, Takehiro Mineo, Kiyofumi Nitta, Kazuo Kato, Hiroaki Nitani, Hitoshi Abe, Tomoya Uruga, Hiroshi Kondoh

Department of Chemistry

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8 Citations (Scopus)

Abstract

The migration of photoexcited carriers from a SrTiO₃ photocata lyst to a MnO_x cocatalyst during oxygen evolution from an aqueous AgNO₃ solution under UV irradiat ion was investigated by in situ Mn K-edge X-ray absorption fine structure (XAFS) spectroscopy. The absorption edge of the XAFS spectrum shifted to higher energy values during the photocata l ytic reaction as the sacrificial reagent was consumed. This indicates that the MnOx cocatalyst was ox idized by the transfer o f photogenerated holes, resulting in a positive potential shift of the cocatalyst throughout the oxygen evolution reaction.

Original language	English
Pages (from-to)	1725-1727
Number of pages	3
Journal	Chemistry Letters
Volume	43
Issue number	11
DOIs	https://doi.org/10.1246/cl.140666
Publication status	Published - 2014

ASJC Scopus subject areas

Chemistry(all)

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title = "In situ XAFS study of the photoinduced potent ial shift of a MnOx cocatalyst on a SrTiO3 photocatalyst",

abstract = "The migration of photoexcited carriers from a SrTiO3 photocata lyst to a MnOx cocatalyst during oxygen evolution from an aqueous AgNO3 solution under UV irradiat ion was investigated by in situ Mn K-edge X-ray absorption fine structure (XAFS) spectroscopy. The absorption edge of the XAFS spectrum shifted to higher energy values during the photocata l ytic reaction as the sacrificial reagent was consumed. This indicates that the MnOx cocatalyst was ox idized by the transfer o f photogenerated holes, resulting in a positive potential shift of the cocatalyst throughout the oxygen evolution reaction.",

author = "Masaaki Yoshida and Narihiro Gon and Saaya Maeda and Takehiro Mineo and Kiyofumi Nitta and Kazuo Kato and Hiroaki Nitani and Hitoshi Abe and Tomoya Uruga and Hiroshi Kondoh",

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language = "English",

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T1 - In situ XAFS study of the photoinduced potent ial shift of a MnOx cocatalyst on a SrTiO3 photocatalyst

AU - Yoshida, Masaaki

AU - Gon, Narihiro

AU - Maeda, Saaya

AU - Mineo, Takehiro

AU - Nitta, Kiyofumi

AU - Kato, Kazuo

AU - Nitani, Hiroaki

AU - Abe, Hitoshi

AU - Uruga, Tomoya

AU - Kondoh, Hiroshi

PY - 2014

Y1 - 2014

N2 - The migration of photoexcited carriers from a SrTiO3 photocata lyst to a MnOx cocatalyst during oxygen evolution from an aqueous AgNO3 solution under UV irradiat ion was investigated by in situ Mn K-edge X-ray absorption fine structure (XAFS) spectroscopy. The absorption edge of the XAFS spectrum shifted to higher energy values during the photocata l ytic reaction as the sacrificial reagent was consumed. This indicates that the MnOx cocatalyst was ox idized by the transfer o f photogenerated holes, resulting in a positive potential shift of the cocatalyst throughout the oxygen evolution reaction.

AB - The migration of photoexcited carriers from a SrTiO3 photocata lyst to a MnOx cocatalyst during oxygen evolution from an aqueous AgNO3 solution under UV irradiat ion was investigated by in situ Mn K-edge X-ray absorption fine structure (XAFS) spectroscopy. The absorption edge of the XAFS spectrum shifted to higher energy values during the photocata l ytic reaction as the sacrificial reagent was consumed. This indicates that the MnOx cocatalyst was ox idized by the transfer o f photogenerated holes, resulting in a positive potential shift of the cocatalyst throughout the oxygen evolution reaction.

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JF - Chemistry Letters

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In situ XAFS study of the photoinduced potent ial shift of a MnO_x cocatalyst on a SrTiO₃ photocatalyst

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