DOI: 10.1111/j.1151-2916.1991.tb04328.x. X‐ray Absorption Studies of Ceria with Trivalent Dopants

X‐ray Absorption Studies of Ceria with Trivalent Dopants

10.1111/j.1151-2916.1991.tb04328.x

Crossref journal-article

Wiley

Journal of the American Ceramic Society (311)

Abstract

The local structural environments of Sc3+ and Gd3+ in ceria were studied for the first time by using EXAFS (extended X‐ray absorption fine structure) and XANES (X‐ray absorption near edge structure) spectroscopy. Our results indicate that Sc3+ in 10‐mol%‐Sc2O3‐doped ceria has a 7‐fold‐coordinated Sc‐ordered structure with two different Sc─O distances (2.13 and 2.26 Å). An octahedrally coordinated Sc─O cluster is present in 5 mol% Sc2O3─5 mol% Gd2O3─CeO2, because of the strong scavenging effect of Sc3+ ions on oxygen vacancies created by Gd3+. The Gd3+ in this sample is largely unassociated. Sc2O3 (5 mol%) and Gd2O3 (5 or 10 mol%) form random solid solutions with CeO2. These results are consistent with the current concept of defect structures in this structural family.

Bibliography

Li, P., Chen, I., PennerâHahn, J. E., & Tien, T. (1991). Xâray Absorption Studies of Ceria with Trivalent Dopants. Journal of the American Ceramic Society, 74(5), 958â967. Portico.

Authors 4

Ping Li (first)
I‐Wei Chen (additional)
James E. Penner‐Hahn (additional)
Tseng‐Ying Tien (additional)

References 25 Referenced 67

10.1016/B978-0-12-522662-2.50008-X
10.1016/0167-2738(81)90313-1
10.1016/0022-3697(83)90110-5
{'key': 'e_1_2_1_5_2', 'first-page': '673', 'volume-title': 'Fast Ion Transport in Solids', 'author': 'Nowick A. S.', 'year': '1979'} / Fast Ion Transport in Solids by Nowick A. S. (1979)
10.1016/0167-2738(81)90309-X
10.1016/0022-3697(87)90053-9
10.1016/0167-2738(81)90314-3
10.1016/0167-2738(83)90113-3 / Solid State Ionics / Study of Sc2O3‐Doped Ceria by Anelastic Relaxation by Gerhardt R. (1983)
10.1111/j.1151-2916.1982.tb10343.x
10.1149/1.2134143
10.1111/j.1151-2916.1965.tb14742.x
10.1016/0022-4596(75)90272-8
10.1016/0167-2738(89)90472-4
10.1107/S0567740868003948
{'key': 'e_1_2_1_16_2', 'first-page': '2', 'volume-title': 'X‐Ray Data Booklet', 'author': 'Williams G. P.', 'year': '1986'} / X‐Ray Data Booklet by Williams G. P. (1986)
{'key': 'e_1_2_1_17_2', 'first-page': '131', 'volume-title': 'EXAFS: Basic Principles and Data Analysis', 'author': 'Teo B. K.', 'year': '1984'} / EXAFS: Basic Principles and Data Analysis by Teo B. K. (1984)
10.1139/v68-236
G. S.WaldoandJ. E.Penner‐Hahn; unpublished work.
10.1107/S0567739476001551
{'key': 'e_1_2_1_21_2', 'first-page': '545', 'volume-title': 'Structural Inorganic Chemistry', 'author': 'Wells A. F.', 'year': '1984'} / Structural Inorganic Chemistry by Wells A. F. (1984)
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{'key': 'e_1_2_1_25_2', 'first-page': '47', 'article-title': 'Ordering in Anion‐Deficient Fluorite‐Related Oxides', 'volume': '3', 'author': 'Rossell H. J.', 'year': '1981', 'journal-title': 'Adv. Ceram.'} / Adv. Ceram. / Ordering in Anion‐Deficient Fluorite‐Related Oxides by Rossell H. J. (1981)
10.1016/0022-3697(89)90415-0

Dates

Type	When
Created	20 years, 5 months ago (March 8, 2005, 12:09 p.m.)
Deposited	1 year, 9 months ago (Nov. 23, 2023, 6:43 a.m.)
Indexed	9 hours, 43 minutes ago (Sept. 6, 2025, 3:44 p.m.)
Issued	34 years, 4 months ago (May 1, 1991)
Published	34 years, 4 months ago (May 1, 1991)
Published Online	20 years, 5 months ago (March 8, 2005)
Published Print	34 years, 4 months ago (May 1, 1991)

Funders 0

None

BibTeX

@article{Li_1991, title={X‐ray Absorption Studies of Ceria with Trivalent Dopants}, volume={74}, ISSN={1551-2916}, url={http://dx.doi.org/10.1111/j.1151-2916.1991.tb04328.x}, DOI={10.1111/j.1151-2916.1991.tb04328.x}, number={5}, journal={Journal of the American Ceramic Society}, publisher={Wiley}, author={Li, Ping and Chen, I‐Wei and Penner‐Hahn, James E. and Tien, Tseng‐Ying}, year={1991}, month=may, pages={958–967} }

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