The structure of Mn3O4 (110) thin films

被引：12

作者：

Caetano, Rubem ^{[1
]}

Ali, Astrid ^{[1
]}

Barreto, Jade ^{[1
]}

Felix, Guilherme ^{[1
]}

Ramos, Maria I. ^{[2
]}

Archanjo, Braulio S. ^{[2
]}

Achete, Carlos A. ^{[2
]}

Annese, Emilia ^{[1
,2
]}

Stavale, Fernando ^{[1
]}

机构：

[1] Brazilian Ctr Res Phys, BR-22290180 Rio De Janeiro, RJ, Brazil

[2] Natl Inst Metrol Qual & Technol, BR-25250020 Duque De Caxias, Brazil

来源：

SURFACE SCIENCE | 2022年 / 720卷

关键词：

Transition metal oxides; Surface structure; Scanning tunneling microscopy; Scanning transmission electron microscopy; thin film growth; MANGANESE OXIDES; MN; SURFACE; OXIDATION; INSIGHTS; GROWTH; STM;

D O I：

10.1016/j.susc.2022.122062

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：

In this work, we examined the structure of Mn3O4 (110) thin films. Generally, Mn3+ and Mn2+ cation ratios on manganese oxide surfaces are expected to contribute to the catalytic activity of Mn3O4. However, the thermodynamically stable Mn3O4 (hausmannite) surface structure is not fully understood. Therefore, we investigated Mn3O4 films on Cu(111) combining X-ray photoelectron spectroscopy, low energy electron diffraction, scanning transmission electron microscopy, and scanning tunneling microscopy. Our results suggest a termination layer of Mn3O4 (110) film with a fully oxidized Mn2+ layer for the topmost surface and Mn3+ cations at the interface with Cu(111). The Mn3O4 (110) surface undergoes lattice distortions that may affect its chemical and physical properties known to be relevant for surface reactivity.

引用

页数：6

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