Vacancy-Induced Electronic Structure Variation of Acceptors and Correlation with Proton Conduction in Perovskite Oxides
SCIE
SCOPUS
- Title
- Vacancy-Induced Electronic Structure Variation of Acceptors and Correlation with Proton Conduction in Perovskite Oxides
- Authors
- KIM, HYE SUNG; JANG, AHREUM; CHOI, SI YOUNG; JUNG, WOOCHUL; CHUNG, SUNG YOON
- Date Issued
- 2016-10-17
- Publisher
- WILEY-V C H VERLAG GMBH
- Abstract
- In most proton-conducing perovskite oxides, the electrostatic attraction between negatively charged acceptor dopants and protonic defects having a positive charge is known to be a major cause of retardation of proton conduction, a phenomenon that is generally referred to as proton trapping. We experimentally show that proton trapping can be suppressed by clustering of positively charged oxygen vacancies to acceptors in BaZrO3- and BaCeO3-. In particular, to ensure the vacancy-acceptor association is effective against proton trapping, the valence electron density of acceptors should not significantly vary when the oxygen vacancies cluster, based on the weak hybridization between the valence d or p orbitals of acceptors and the 2p orbitals of oxygen.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/96279
- DOI
- 10.1002/anie.201603835
- ISSN
- 1433-7851
- Article Type
- Article
- Citation
- ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, vol. 55, no. 43, page. 13499 - 13503, 2016-10-17
- Files in This Item:
- There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.