Topotactic electrochemical redox reactions of the defect perovskite SrCoO2.5+x

被引：129

作者：

Nemudry, A

Rudolf, P

Schollhorn, R

机构：

[1] TECH UNIV BERLIN, INST ANORGAN & ANALYT CHEM, D-10623 BERLIN, GERMANY

[2] RUSSIAN ACAD SCI, INST SOLID STATE CHEM, NOVOSIBIRSK 630090, RUSSIA

来源：

CHEMISTRY OF MATERIALS | 1996年 / 8卷 / 09期

关键词：

D O I：

10.1021/cm950504+

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 electrochemical and chemical oxidation of the defect perovskite SrCoO2.5 to the cubic perovskite SrCoO3 at ambient temperature in alkaline electrolyte are shown to be reversible processes with the appearance of intermediate compounds; the phase diagram can be described by two line phases SrCoO2.5 and SrCoO2.75 and one solid solution range SrCoO2.87+y with 0 < y < 0.13. The redox cycle displays a structural hysteresis under dynamic conditions, Several models are discussed in order to explain the unusual phenomenon of room temperature bulk oxygen transport.

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页码：2232 / 2238

页数：7

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