准平衡模式下复杂氧化物 La2NiO4 + δ 的高温氧释放

IF 1.1 4区工程技术 Q4 ELECTROCHEMISTRY

Russian Journal of Electrochemistry Pub Date : 2024-05-08 DOI:10.1134/s102319352403011x

E. S. Tropin, M. P. Popov, R. D. Gus’kov, A. P. Nemudry

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引用次数: 0

摘要

摘要通过准平衡氧释放的方法，得到了具有层状透辉石样 Ruddlesden-Popper 结构的非化学计量氧化物 La2NiO4 + δ 的连续准平衡相图 δ(pO2，T)。热力学参数是作为氧化物非全度 δ 的函数确定的。计算是在局部电子模型和巡回电子模型的框架内进行的，这两种模型分别用于描述铁氧体和钴酸盐的缺陷结构。结果表明，相图的具体特征与费米级附近的电子密度有关。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

High-Temperature Oxygen Release from Complex Oxide La2NiO4 + δ in Quasi-Equilibrium Mode

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High-Temperature Oxygen Release from Complex Oxide La2NiO4 + δ in Quasi-Equilibrium Mode

Abstract

A continuous quasi-equilibrium phase diagram δ(pO₂, T) of a nonstoichiometric oxide La₂NiO_{4 + δ} with the layered perovskite-like Ruddlesden–Popper structure is obtained by the method of quasi-equilibrium oxygen release. The thermodynamic parameters are determined as a function of the oxide nonstoichiometry δ. Calculations are carried out within the framework of the localized-electron and itinerant-electron models which are used for description of the defect structure of ferrites and cobaltites, respectively. It is shown that the specific features of the phase diagram can be related to the electronic density of states near the Fermi level.

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来源期刊

Russian Journal of Electrochemistry 工程技术-电化学

CiteScore

1.90

自引率

8.30%

发文量

102

审稿时长

6 months

期刊介绍： Russian Journal of Electrochemistry is a journal that covers all aspects of research in modern electrochemistry. The journal welcomes submissions in English or Russian regardless of country and nationality of authors.