X射线光电子能谱
扫描隧道显微镜
透射电子显微镜
扫描电子显微镜
薄膜
低能电子衍射
结晶学
锰
氧化物
化学
图层(电子)
扫描透射电子显微镜
材料科学
衍射
电子衍射
分析化学(期刊)
纳米技术
化学工程
光学
有机化学
复合材料
色谱法
工程类
物理
作者
Rubem Caetano,Astrid Alí,Jade Barreto,Guilherme Félix,Maria I. Ramos,Bráulio S. Archanjo,Carlos A. Achete,E. Annese,Fernando Stavale
出处
期刊:Surface Science
[Elsevier]
日期:2022-06-01
卷期号:720: 122062-122062
被引量:6
标识
DOI:10.1016/j.susc.2022.122062
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.
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