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Pump Probe XAFS

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Abstract

Changes of structure and chemical states of catalysts have been successfully observed with XAFS under reaction conditions. Nowadays, a XAFS spectrum can be obtained even within several milliseconds by using quick XAFS (QXAFS) and dispersive XAFS (DXAFS) techniques. However, much faster fundamental processes of catalysts should be also key phenomena to understanding catalytic reactions. For example, lifetimes of photocarriers, transfer processes and active sites of catalysis should govern the photocatalytic activity. In order to observe such fast events, the demanding time resolution of XAFS measurements is less than microseconds, which is much shorter than the time resolution of QXAFS and DXAFS techniques. A pump-probe XAFS technique is applicable if the processes can take place repeatedly. The pump-probe XAFS technique has been developed since 1980s [1]. Nowadays, the time range of phenomena observed by the pump-probe XAFS technique is from sub-picoseconds to several hundreds of microseconds.

Keywords

  • Photocatalytic Activity
  • Electron Bunch
  • XANES Spectrum
  • Advance Light Source
  • Photoexcitation State

These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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  • DOI: 10.1007/978-3-319-43866-5_9
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Correspondence to Toshihiko Yokoyama .

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Yokoyama, T., Uemura, Y. (2017). Pump Probe XAFS. In: Iwasawa, Y., Asakura, K., Tada, M. (eds) XAFS Techniques for Catalysts, Nanomaterials, and Surfaces. Springer, Cham. https://doi.org/10.1007/978-3-319-43866-5_9

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