Photoinduced anisotropic distortion as the electron trapping site of tungsten trioxide by ultrafast W L₁-edge X-ray absorption spectroscopy with full potential multiple scattering calculations

• Koide, Akihiro

• Uemura, Yohei

• Kido, Daiki

• Wakisaka, Yuki

• Takakusagi, Satoru

• Ohtani, Bunsho

• Niwa, Yasuhiro

• Nozawa, Shunsuke

• Ichiyanagi, Kohei

• Fukaya, Ryo

• Adachi, Shin-ichi

• Katayama, Tetsuo

• Togashi, Tadashi

• Owada, Shigeki

• Yabashi, Makina

• Yamamoto, Yusaku

• Katayama, Misaki

• Hatada, Keisuke

• Yokoyama, Toshihiko

• Asakura, Kiyotaka

書誌事項

タイトル別名

• Photoinduced anisotropic distortion as the electron trapping site of tungsten trioxide by ultrafast W L-1-edge X-ray absorption spectroscopy with full potential multiple scattering calculations

抄録

Understanding the excited state of photocatalysts is significant to improve their activity for water splitting reaction. X-ray absorption fine structure (XAFS) spectroscopy in X-ray free electron lasers (XFEL) is a powerful method to address dynamic changes in electronic states and structures of photocatalysts in the excited state in ultrafast short time scales. The ultrafast atomic-scale local structural change in photoexcited WO3 was observed by W L-1 edge XAFS spectroscopy using an XFEL. An anisotropic local distortion around the W atom could reproduce well the spectral features at a delay time of 100 ps after photoexcitation based on full potential multiple scattering calculations. The distortion involved the movement of W to shrink the shortest W-O bonds and elongate the longest one. The movement of the W atom could be explained by the filling of the d(xy) and d(zx) orbitals, which were originally located at the bottom of the conduction band with photoexcited electrons.

収録刊行物

• Physical chemistry chemical physics

  Physical chemistry chemical physics 22 (5), 2615-2621, 2020-02-07

  Royal Society of Chemistry

キーワード

• Physical and Theoretical Chemistry
• General Physics and Astronomy

詳細情報

• CRID: 1050568617180059520
• NII論文ID: 120006957263
• DOI: 10.1039/c9cp01332f
• ISSN: 14639084
• ISSN: 14639076
• HANDLE: 2115/80380
• Web Site: http://pubs.rsc.org/en/content/articlepdf/2020/CP/C9CP01332F
• 本文言語コード: en
• 資料種別: journal article
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