Dissociative water vapour absorption in BaZr0.85Y0.15O2.925/H2O:: pressure-composition isotherms in terms of Fermi-Dirac statistics

被引：13

作者：

Gross, B ^{[1
]}

Engeldinger, J

Grambole, D

Herrmann, F

Hempelmann, R

机构：

[1] Univ Saarlandes, D-66123 Saarbrucken, Germany

[2] Rossendorf Inc, Forschungszentrum, D-01314 Dresden, Germany

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2000年 / 2卷 / 02期

关键词：

D O I：

10.1039/a907946g

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：

Thin films of proton-conducting BaZr0.85Y0.15O2.925 perovskite-type ceramics, prepared in a sol-gel process by multiple dip-coating on silicon single crystal wafers, and powder samples, prepared by the conventional carbonate route, were charged with hydrogen by dissociative water absorption at definite values of water vapour pressures and temperatures. The absolute content of the absorbed hydrogen was determined ex situ at room temperature using the N-15 nuclear resonance reaction analysis. From the resulting water vapour pressure-hydrogen composition isotherms the absorption enthalpies and entropy were calculated, using our two site model, based on Fermi-Dirac statistics.

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页码：297 / 301

页数：5

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