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Visualization of the Heterogeneity of Cerium Oxidation States in Single Pt/Ce 2 Zr 2 O x Catalyst Particles by Nano‐XAFS
Author(s) -
Ishiguro Nozomu,
Uruga Tomoya,
Sekizawa Oki,
Tsuji Takuya,
Suzuki Motohiro,
Kawamura Naomi,
Mizumaki Masaichiro,
Nitta Kiyofumi,
Yokoyama Toshihiko,
Tada Mizuki
Publication year - 2014
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.201400090
Subject(s) - x ray absorption fine structure , xanes , cerium , catalysis , extended x ray absorption fine structure , cerium oxide , materials science , analytical chemistry (journal) , nano , absorption (acoustics) , absorption spectroscopy , x ray absorption spectroscopy , crystallography , chemistry , spectral line , inorganic chemistry , spectroscopy , optics , physics , biochemistry , chromatography , quantum mechanics , astronomy , composite material
The cerium oxidation states in single catalyst particles of Pt/Ce 2 Zr 2 O x ( x =7 to 8) were investigated by spatially resolved nano X‐ray absorption fine structure (nano‐XAFS) using an X‐ray nanobeam. Differences in the distribution of the Ce oxidation states between Pt/Ce 2 Zr 2 O x single particles of different oxygen compositions x were visualized in the obtained two‐dimensional X‐ray fluorescent (XRF) mapping images and the Ce L III ‐edge nano X‐ray absorption near‐edge structure (nano‐XANES) spectra.