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

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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.

Original languageEnglish
Pages (from-to)1725-1727
Number of pages3
JournalChemistry Letters
Volume43
Issue number11
DOIs
Publication statusPublished - 2014

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X ray absorption
Photocatalysts
X ray absorption fine structure spectroscopy
Oxygen
Ions
strontium titanium oxide

ASJC Scopus subject areas

  • Chemistry(all)

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In situ XAFS study of the photoinduced potent ial shift of a MnOx cocatalyst on a SrTiO3 photocatalyst. / Yoshida, Masaaki; Gon, Narihiro; Maeda, Saaya; Mineo, Takehiro; Nitta, Kiyofumi; Kato, Kazuo; Nitani, Hiroaki; Abe, Hitoshi; Uruga, Tomoya; Kondoh, Hiroshi.

In: Chemistry Letters, Vol. 43, No. 11, 2014, p. 1725-1727.

Research output: Contribution to journalArticle

Yoshida, M, Gon, N, Maeda, S, Mineo, T, Nitta, K, Kato, K, Nitani, H, Abe, H, Uruga, T & Kondoh, H 2014, 'In situ XAFS study of the photoinduced potent ial shift of a MnOx cocatalyst on a SrTiO3 photocatalyst', Chemistry Letters, vol. 43, no. 11, pp. 1725-1727. https://doi.org/10.1246/cl.140666
Yoshida, Masaaki ; Gon, Narihiro ; Maeda, Saaya ; Mineo, Takehiro ; Nitta, Kiyofumi ; Kato, Kazuo ; Nitani, Hiroaki ; Abe, Hitoshi ; Uruga, Tomoya ; Kondoh, Hiroshi. / In situ XAFS study of the photoinduced potent ial shift of a MnOx cocatalyst on a SrTiO3 photocatalyst. In: Chemistry Letters. 2014 ; Vol. 43, No. 11. pp. 1725-1727.
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