BROWSE

Related Researcher

Author's Photo

Kim, Guntae
gunslab
Research Interests
  • Solid Oxide Fuel Cells (SOFCs)& SOE, PEMFC, metal-air batteries, Metal-CO2 system, Catalyst for DRM

ITEM VIEW & DOWNLOAD

Probing One-Dimensional Oxygen Vacancy Channels Driven by Cation–Anion Double Ordering in Perovskites

Cited 0 times inthomson ciCited 0 times inthomson ci
Title
Probing One-Dimensional Oxygen Vacancy Channels Driven by Cation–Anion Double Ordering in Perovskites
Author
Kwon, OhhunKim, Yong InKim, KyeounghakKim, Jong ChanLee, Jong HoonPark, Sung SooHan, Jeong WooKim, Young-MinKim, GuntaeJeong, Hu Young
Issue Date
2020-11
Publisher
American Chemical Society
Citation
NANO LETTERS, v.20, pp.8353 - 8359
Abstract
Visualizing the oxygen vacancy distributions is highly desirable for understanding the atomistic oxygen diffusion mechanisms in perovskites. In particular, the direct observation of the one-dimensional oxygen vacancy channels has not yet been achieved in perovskites with dual ion (i.e., cation and anion) ordering. Here, we perform atomic-resolution imaging of the one-dimensional oxygen vacancy channels and their structural dynamics in a NdBaCo2O5.5 double perovskite oxide. An in situ heating transmission electron microscopy investigation reveals the disordering of oxygen vacancy channels by local rearrangement of oxygen vacancies at the specific temperature. A density functional theory calculation suggests that the possible pathway of oxygen vacancy migration is a multistep route via Co–O and Nd–Ov (oxygen vacancy) sites. These findings could provide robust guidance for understanding the static and dynamic behaviors of oxygen vacancies in perovskite oxides.
URI
https://scholarworks.unist.ac.kr/handle/201301/48767
URL
https://pubs.acs.org/doi/abs/10.1021/acs.nanolett.0c03516
DOI
10.1021/acs.nanolett.0c03516
ISSN
1530-6984
Appears in Collections:
UCRF_Journal Papers
MSE_Journal Papers
ECHE_Journal Papers
Files in This Item:
There are no files associated with this item.

find_unist can give you direct access to the published full text of this article. (UNISTARs only)

Show full item record

qrcode

  • mendeley

    citeulike

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

MENU