On the Iron Oxidation State in the Iron-Substituted Gamma-Nickel Oxyhydroxides

被引：40

作者：

Demourgues-Guerlou, L

Fournes, L

Delmas, C

机构：

[1] CNRS, Chim Solide Lab, F-33405 Talence, FRANCE

[2] Univ Bordeaux 1, Ecole Natl Super Chim & Phys Bordeaux, F-33405 Talence, FRANCE

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 1995年 / 114卷 / 01期

关键词：

D O I：

10.1006/jssc.1995.1002

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

In order to improve the knowledge of the electrochemical cycling process that involves the hydrated iron-substituted nickel hydroxides, the cationic oxidation state distribution in gamma-oxidized materials has been studied. Magnetic measurements and Mossbauer data show that, for small iron compositions, most of the iron ions are in the low-spin tetravalent state, while for higher iron concentrations, the Fe3+ (HS) ions are stabilized. Comparison with the homologous cobalt system suggests that the oxidation state of the substituting cation varies in order to accommodate the crystal field imposed by the prevailing cations. (C) 1995 Academic Press, Inc.

引用

页码：6 / 14

页数：9

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