In Situ Picosecond XAFS Study of an Excited State of Tungsten Oxide

• Yohei Uemura

  Division of Electronic Structure, Department of Materials Science, Institute of Molecular Science

• Hiromitsu Uehara

  Catalysis Research Center, Hokkaido University

• Yasuhiro Niwa

  Photon Factory, Institute of Material Structure Science, High Energy Accelerator Research Organization

• Shunsuke Nozawa

  Photon Factory, Institute of Material Structure Science, High Energy Accelerator Research Organization

• Tokushi Sato

  Photon Factory, Institute of Material Structure Science, High Energy Accelerator Research Organization

• Shinichi Adachi

  Photon Factory, Institute of Material Structure Science, High Energy Accelerator Research Organization

• Bunsho Ohtani

  Catalysis Research Center, Hokkaido University

• Satoru Takakusagi

  Catalysis Research Center, Hokkaido University

• Kiyotaka Asakura

  Catalysis Research Center, Hokkaido University

Abstract

The electronic state modification and the decay process of WO3 after photoabsorption were followed using picosecond X-ray absorption fine structure (XAFS) spectroscopy. The W d(eg) orbital was filled by transition from the oxygen valence state. The decay process is explained mostly by a first-order process with a rate constant k = 0.5 ± 0.1 ns−1. The UV optical length is extremely important to follow the photoreduction process using XAFS spectroscopy.

Journal

• Chemistry Letters

  Chemistry Letters 43 (7), 977-979, 2014-03-28

  Oxford University Press (OUP)

Keywords

• General Chemistry

Details

• CRID: 1360283694082225920
• NII Article ID: 130004868227
• DOI: 10.1246/cl.140144
• ISSN: 13480715
• ISSN: 03667022
• Web Site: https://academic.oup.com/chemlett/article-pdf/43/7/977/55641500/cl.140144.pdf
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