Oxygen-17NMR study of defects in LnO1.5-CeO2 (Ln = La and Nd)

Mariko Ando; Itaru Oikawa; Shinobu Ohki; Masataka Tansho; Tadashi Shimizu; Hideki Maekawa; Hajime Kiyono

doi:10.1246/cl.2013.57

Oxygen-17NMR study of defects in LnO_1.5-CeO₂ (Ln = La and Nd)

Mariko Ando, Itaru Oikawa, Shinobu Ohki, Masataka Tansho, Tadashi Shimizu, Hideki Maekawa, Hajime Kiyono

ENG - Materials Science

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

The local structure around the oxide ions in LnO_1.5-CeO ₂ (Ln = La, Nd) was studied by using 17ONMR spectroscopy. Each spectrum of LnO_1.5-CeO₂ showed a broad peak due to a distribution of oxygen tetrahedra. From the peak separation, the relative numbers of oxygen tetrahedra, O[Ce]₄, O[Ce]₃[Ln], and O[Ce]₂[Ln]₂, were determined quantitatively. In the La₂O₃CeO₂ system, the amounts of O[Ce] ₄, O[Ce]₃[Ln], and O[Ce]₂[Ln]₂ deviated from the calculated value for over 20 mol% La-doped ceria (LDC). The distribution of oxygen tetrahedra for LaO1.5CeO2 differed from those in LnO _1.5CeO₂ (Ln = Nd, Y). These results suggest that the stability of the oxygen tetrahedra changes with the size of the doped ions.

Original language	English
Pages (from-to)	57-59
Number of pages	3
Journal	Chemistry Letters
Volume	42
Issue number	1
DOIs	https://doi.org/10.1246/cl.2013.57
Publication status	Published - 2013 Jan

Access to Document

10.1246/cl.2013.57

Cite this

@article{addf768650934090a7afb1bec9b21539,

title = "Oxygen-17NMR study of defects in LnO1.5-CeO2 (Ln = La and Nd)",

abstract = "The local structure around the oxide ions in LnO1.5-CeO 2 (Ln = La, Nd) was studied by using 17ONMR spectroscopy. Each spectrum of LnO1.5-CeO2 showed a broad peak due to a distribution of oxygen tetrahedra. From the peak separation, the relative numbers of oxygen tetrahedra, O[Ce]4, O[Ce]3[Ln], and O[Ce]2[Ln]2, were determined quantitatively. In the La2O3CeO2 system, the amounts of O[Ce] 4, O[Ce]3[Ln], and O[Ce]2[Ln]2 deviated from the calculated value for over 20 mol% La-doped ceria (LDC). The distribution of oxygen tetrahedra for LaO1.5CeO2 differed from those in LnO 1.5CeO2 (Ln = Nd, Y). These results suggest that the stability of the oxygen tetrahedra changes with the size of the doped ions.",

author = "Mariko Ando and Itaru Oikawa and Shinobu Ohki and Masataka Tansho and Tadashi Shimizu and Hideki Maekawa and Hajime Kiyono",

year = "2013",

month = jan,

doi = "10.1246/cl.2013.57",

language = "English",

volume = "42",

pages = "57--59",

journal = "Chemistry Letters",

issn = "0366-7022",

publisher = "The Chemical Society of Japan",

number = "1",

}

TY - JOUR

T1 - Oxygen-17NMR study of defects in LnO1.5-CeO2 (Ln = La and Nd)

AU - Ando, Mariko

AU - Oikawa, Itaru

AU - Ohki, Shinobu

AU - Tansho, Masataka

AU - Shimizu, Tadashi

AU - Maekawa, Hideki

AU - Kiyono, Hajime

PY - 2013/1

Y1 - 2013/1

N2 - The local structure around the oxide ions in LnO1.5-CeO 2 (Ln = La, Nd) was studied by using 17ONMR spectroscopy. Each spectrum of LnO1.5-CeO2 showed a broad peak due to a distribution of oxygen tetrahedra. From the peak separation, the relative numbers of oxygen tetrahedra, O[Ce]4, O[Ce]3[Ln], and O[Ce]2[Ln]2, were determined quantitatively. In the La2O3CeO2 system, the amounts of O[Ce] 4, O[Ce]3[Ln], and O[Ce]2[Ln]2 deviated from the calculated value for over 20 mol% La-doped ceria (LDC). The distribution of oxygen tetrahedra for LaO1.5CeO2 differed from those in LnO 1.5CeO2 (Ln = Nd, Y). These results suggest that the stability of the oxygen tetrahedra changes with the size of the doped ions.

AB - The local structure around the oxide ions in LnO1.5-CeO 2 (Ln = La, Nd) was studied by using 17ONMR spectroscopy. Each spectrum of LnO1.5-CeO2 showed a broad peak due to a distribution of oxygen tetrahedra. From the peak separation, the relative numbers of oxygen tetrahedra, O[Ce]4, O[Ce]3[Ln], and O[Ce]2[Ln]2, were determined quantitatively. In the La2O3CeO2 system, the amounts of O[Ce] 4, O[Ce]3[Ln], and O[Ce]2[Ln]2 deviated from the calculated value for over 20 mol% La-doped ceria (LDC). The distribution of oxygen tetrahedra for LaO1.5CeO2 differed from those in LnO 1.5CeO2 (Ln = Nd, Y). These results suggest that the stability of the oxygen tetrahedra changes with the size of the doped ions.

UR - http://www.scopus.com/inward/record.url?scp=84871791803&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84871791803&partnerID=8YFLogxK

U2 - 10.1246/cl.2013.57

DO - 10.1246/cl.2013.57

M3 - Article

AN - SCOPUS:84871791803

SN - 0366-7022

VL - 42

SP - 57

EP - 59

JO - Chemistry Letters

JF - Chemistry Letters

IS - 1

ER -

Oxygen-17NMR study of defects in LnO_1.5-CeO₂ (Ln = La and Nd)

Abstract

Access to Document

Other files and links

Fingerprint

Cite this