Capturing local structure modulations of photoexcited BiVO4 by ultrafast transient XAFS

Yohei Uemura; Daiki Kido; Akihiro Koide; Yuki Wakisaka; Yasuhiro Niwa; Shunsuke Nozawa; Kohei Ichiyanagi; Ryo Fukaya; Shin-ichi Adachi; Tetsuo Katayama; Tadashi Togashi; Shigeki Owada; Makina Yabashi; Keisuke Hatada; Akihide Iwase; Akihiko Kudo; Satoru Takakusagi; Toshihiko Yokoyama; Kiyotaka Asakura

doi:10.1039/C7CC02201H

Capturing local structure modulations of photoexcited BiVO₄ by ultrafast transient XAFS†

Yohei Uemura,

*^a Daiki Kido,^b Akihiro Koide,^a Yuki Wakisaka,^b Yasuhiro Niwa,^c Shunsuke Nozawa,^c Kohei Ichiyanagi,^c Ryo Fukaya,^c Shin-ichi Adachi,^c Tetsuo Katayama,^d Tadashi Togashi,^d Shigeki Owada,^e Makina Yabashi,^e Keisuke Hatada,^f Akihide Iwase,

^g Akihiko Kudo,^g Satoru Takakusagi,^b Toshihiko Yokoyama^a and Kiyotaka Asakura

^b

Author affiliations

* Corresponding authors

^a Institute for Molecular Science, Myodaiji-cho, Okazaki 444-8585, Japan
E-mail: y-uemura@ims.ac.jp

^b Institute for Catalysis, Hokkaido University, Sapporo 001-0021, Japan

^c Photon Factory, IMSS, KEK Tsukuba 305-0801, Japan

^d JASRI, KoutoSayo-cho, Hyogo 679-5198, Japan

^e RIKEN SPring-8 Center, KoutoSayo-cho, Hyogo 679-5148, Japan

^f Department Chemie, Physikalische Chemie, Universität München, Butenandstraße 5-13, D-81377 München, Germany

^g Department of Applied Chemistry, Faculty of Science, Tokyo University of Science, 1-3 Kagurazaka, Shinjuku-ku, Tokyo 162-8601, Japan

Abstract

Ultrafast excitation of photocatalytically active BiVO₄ was characterized by femto- and picosecond transient X-ray absorption fine structure spectroscopy. An initial photoexcited state (≪500 fs) changed to a metastable state accompanied by a structural change with a time constant of ∼14 ps. The structural change might stabilize holes on oxygen atoms since the interaction between Bi and O increases.

This article is part of the themed collection: 2017 Emerging Investigators

Chemical Communications

Capturing local structure modulations of photoexcited BiVO₄ by ultrafast transient XAFS†

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Capturing local structure modulations of photoexcited BiVO₄ by ultrafast transient XAFS

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