金属氧化物过氧化物中质子转移的第一原理研究

IF 1 4区 物理与天体物理 Q4 PHYSICS, APPLIED
A. E. Galashev
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引用次数: 0

摘要

摘要 通过ab initio分子动力学研究了无缺陷透辉石LaScO3的质子传导机制。研究考虑了质子的初始位置和速度、电场和体系温度对质子在包晶型金属氧化物中行为的影响。结果表明,体系的温度是影响质子运动速度的主要因素。质子传导的阿伦尼乌斯温度行为被发现。在没有氧空位的情况下,质子在具有包晶结构的晶体中的运动方向是由质子与晶格声子的相互作用决定的;也就是说,质子通过金属氧化物包晶的迁移具有极性特征。更好地了解质子沿完美的包晶迁移的性质,是改善清洁能源设备特性的途径之一。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

First-Principal Study of Proton Transfer in Metal Oxide Perovskite

First-Principal Study of Proton Transfer in Metal Oxide Perovskite

Abstract

The mechanism of proton conduction of defect-free perovskite LaScO3 was investigated by ab initio molecular dynamics. The effects of the initial location and speed of a proton, the electric field, and the temperature of the system on the behavior of a proton in metal oxides of the perovskite type are considered. It is shown that the temperature of the system is the main factor affecting the speed of proton movement. The Arrhenius temperature behavior of proton conduction is found. In the absence of oxygen vacancies, the direction of proton movement in a crystal with a perovskite structure is determined by its interaction with lattice phonons; i.e., proton migration through metal-oxide perovskite has a polaronic character. Better understanding of the nature of proton migration along the perfect perovskite is one of the ways to improve the characteristics of clean energy devices.

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来源期刊
High Temperature
High Temperature 物理-物理:应用
CiteScore
1.50
自引率
40.00%
发文量
0
审稿时长
4-8 weeks
期刊介绍: High Temperature is an international peer reviewed journal that publishes original papers and reviews written by theoretical and experimental researchers. The journal deals with properties and processes in low-temperature plasma; thermophysical properties of substances including pure materials, mixtures and alloys; the properties in the vicinity of the critical point, equations of state; phase equilibrium; heat and mass transfer phenomena, in particular, by forced and free convections; processes of boiling and condensation, radiation, and complex heat transfer; experimental methods and apparatuses; high-temperature facilities for power engineering applications, etc. The journal reflects the current trends in thermophysical research. It presents the results of present-day experimental and theoretical studies in the processes of complex heat transfer, thermal, gas dynamic processes, and processes of heat and mass transfer, as well as the latest advances in the theoretical description of the properties of high-temperature media.
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