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Development of Surface Fluorescence X‐Ray Absorption Fine Structure Spectroscopy Using a Laue‐Type Monochromator
Author(s) -
Wakisaka Yuki,
Kido Daiki,
Uehara Hiromitsu,
Yuan Qiuyi,
Feiten Felix E.,
Mukai Shingo,
Takakusagi Satoru,
Uemura Yohei,
Yokoyama Toshihiko,
Wada Takahiro,
Uo Motohiro,
Sekizawa Oki,
Uruga Tomoya,
Iwasawa Yasuhiro,
Asakura Kiyotaka
Publication year - 2019
Publication title -
the chemical record
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.61
H-Index - 78
eISSN - 1528-0691
pISSN - 1527-8999
DOI - 10.1002/tcr.201800020
Subject(s) - x ray absorption fine structure , monochromator , materials science , spectroscopy , fluorescence spectroscopy , highly oriented pyrolytic graphite , analytical chemistry (journal) , absorption (acoustics) , fluorescence , optics , chemistry , graphite , optoelectronics , physics , wavelength , chromatography , quantum mechanics , composite material
Surface fluorescence X‐ray absorption fine structure (XAFS) spectroscopy using a Laue‐type monochromator has been developed to acquire structural information about metals with a very low concentrate on a flat highly oriented pyrolytic graphite (HOPG) surface in the presence of electrolytes. Generally, surface fluorescence XAFS spectroscopy is hindered by strong scattering from the bulk, which often chokes the pulse counting detector. In this work, we show that a bent crystal Laue analyzer (BCLA) can efficiently remove the scattered X‐rays from the bulk even in the presence of solution. We applied the technique to submonolayer (∼10 14 atoms cm −2 ) Pt on HOPG and successfully obtained high signal/noise in situ XAFS data in combination with back‐illuminated fluorescence XAFS (BI‐FXAFS) spectroscopy. This technique allows in situ XAFS measurements of flat electrode surfaces to be performed in the presence of electrolytes.