title: Visualization of the heterogeneity of cerium oxidation states in single Pt/Ce₂Zr₂O(x) catalyst particles by nano-XAFS.
abstract: The cerium oxidation states in single catalyst particles of Pt/Ce2Zr2O(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/Ce2Zr2O(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.
authors.affiliation: Research Center for Materials Science, Nagoya University, Furo, Chikusa, Nagoya, Aichi 464-8602 (Japan); Institute for Molecular Science, Nishigo-naka, Myodaiji, Okazaki, Aichi 444-8585 (Japan).
authors.forename: Nozomu
authors.initials: N
authors.lastname: Ishiguro
authors.forename: Tomoya
authors.initials: T
authors.lastname: Uruga
authors.forename: Oki
authors.initials: O
authors.lastname: Sekizawa
authors.forename: Takuya
authors.initials: T
authors.lastname: Tsuji
authors.forename: Motohiro
authors.initials: M
authors.lastname: Suzuki
authors.forename: Naomi
authors.initials: N
authors.lastname: Kawamura
authors.forename: Masaichiro
authors.initials: M
authors.lastname: Mizumaki
authors.forename: Kiyofumi
authors.initials: K
authors.lastname: Nitta
authors.forename: Toshihiko
authors.initials: T
authors.lastname: Yokoyama
authors.forename: Mizuki
authors.initials: M
authors.lastname: Tada
keywords: ceria-zirconia catalyst; imaging; nano X-ray absorption fine structure; oxygen storage capacity; single particles