Observation of dopant effects on hydrogen modes in SrCe0.95M0.05HxO3-δ by neutron vibrational spectroscopy

被引：30
作者：
Karmonik, C [1 ]
Udovic, TJ
Paul, RL
Rush, JJ
Lind, K
Hempelmann, R
机构：
[1] NIST, Ctr Neutron Res, Gaithersburg, MD 20899 USA
[2] Univ Saarbrucken, Saarbrucken, Germany
来源：
SOLID STATE IONICS | 1998年 / 109卷 / 3-4期
关键词：
defect interactions; electroceramics; neutron vibrational spectroscopy; proton conductors; strontium cerate;
D O I：
10.1016/S0167-2738(98)00088-5
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The influence of different dopants on the hydrogen dynamics in the high-temperature protonic conductor based on strontium cerate was investigated by means of neutron vibrational spectroscopy. The differences in the vibrational spectra up to an energy transfer of 130 meV are discussed. The results indicate the presence of a considerable amount of hydrogen associated with the dopant. The corresponding OH vibrational modes were found to depend strongly on the radius of the dopant cation. Moreover, a temperature study revealed a delocalization of the dopant-related hydrogen near 200 K and above. (C) 1998 Elsevier Science B.V. All rights reserved.
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页码：207 / 211
页数：5
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