Pressure/composition isotherms of proton conducting SrYb0.05Zr0.95O2.975/H2O by means of nuclear resonance reaction analysis

被引：11

作者：

Hempelmann, R

Eschenbaum, J

Altmayer, M

Gross, B

Grambole, D

Herrmann, F

Nagengast, D

Krauser, J

Weidinger, A

机构：

[1] ROSSENDORF INC,FORSCHUNGSZENTRUM ROSSENDORF EV,D-01314 DRESDEN,GERMANY

[2] HAHN MEITNER INST BERLIN GMBH,D-14109 BERLIN,GERMANY

来源：

BERICHTE DER BUNSEN-GESELLSCHAFT-PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 1997年 / 101卷 / 07期

关键词：

absorption; materials properties; thermodynamics; solid proton conductor;

D O I：

10.1002/bbpc.19971010702

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：

Films of SrYb0.05Zr0.095O2.975 were prepared by sol-gel processing. Water vapour pressure/hydrogen composition isotherms were recorded ex-situ comprising pressures between 0 and 84.5 kPa and temperatures between 873 and 1073 K. Nuclear Resonance Reaction Analysis (NRRA) was used to determine the hydrogen concentration and, in addition, depth profiles of hydrogen concentration. The chemical potential of interstitial hydrogen in oxides could be determined; from its temperature dependence thermodynamical constants were calculated. We observe two hydrogen fractions with a site energy difference of 20 kJ/mol. A size effect of the thermodynamic properties is observed below a thickness of 350 nm: nanofilms exhibit higher solubility than bulk material.

引用

页码：985 / 993

页数：9

共 26 条

[1] THIN-FILMS OF PROTON CONDUCTING SRZRO3-CERAMICS PREPARED BY THE SOL-GEL METHOD [J].