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

ASJC Scopus subject areas

  • Chemistry(all)

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    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, 43(11), 1725-1727. https://doi.org/10.1246/cl.140666