To the top

Page Manager: Webmaster
Last update: 9/11/2012 3:13 PM

Tell a friend about this page
Print version

Influence of Yttrium Conc… - University of Gothenburg, Sweden Till startsida
Sitemap
To content Read more about how we use cookies on gu.se

Influence of Yttrium Concentration on Local Structure in BaZr(1-x)Y(x)O(3-δ) Based Proton Conductors

Journal article
Authors Caroline W. Mburu
Samuel Mwaniki Gaita
Christopher S. Knee
Michael J. Gatari
Maths Karlsson
Published in Journal of Physical Chemistry C
Volume 121
Issue 30
Pages 16174-16181
ISSN 1932-7447
Publication year 2017
Published at Department of Chemistry and Molecular Biology
Pages 16174-16181
Language en
Links dx.doi.org/10.1021/acs.jpcc.7b05023
pubs.acs.org/doi/abs/10.1021/acs.jp...
Subject categories Materials Chemistry, Chemical Sciences

Abstract

© 2017 American Chemical Society. The evolution of local structure, coordination of protons, and proton conductivity in yttrium-doped barium zirconate, BaZr 1-x Y x O 3-δ (x = 0-0.5), has been investigated using thermal-gravimetric analysis, impedance spectroscopy, and infrared spectroscopy. Low-frequency (50-1000 cm -1 ) infrared absorbance spectra provide evidence of increasing local structural distortions as a function of yttrium concentration as well as subtle differences, mainly linked to the oxygen sublattice, between the dry and hydrated samples. High-frequency (1700-4500 cm -1 ) spectra of the hydrated samples, distinguished by a broad O-H stretch continuum, manifest a varying degree of hydrogen bond interactions between the protons and nearest neighbor oxygens due to the disordered crystal structure with a general weakening in particular of the strongest hydrogen bonding interactions with increasing dopant levels. It is argued that compositions within the range 0.15 ≤ x ≤ 0.3 possess a favorable level of local structural distortions to facilitate high proton conductivity, and this, coupled with a significant proton concentration, may be a factor in explaining the high proton conductivity these phases display.

Page Manager: Webmaster|Last update: 9/11/2012
Share:

The University of Gothenburg uses cookies to provide you with the best possible user experience. By continuing on this website, you approve of our use of cookies.  What are cookies?

Denna text är utskriven från följande webbsida:
http://www.gu.se/english/research/publication/?languageId=100001&disableRedirect=true&returnUrl=http%3A%2F%2Fwww.gu.se%2Fforskning%2Fpublikation%2F%3FpublicationId%3D256937&publicationId=256937
Utskriftsdatum: 2020-08-06