A study of in situ reduction of MoO3 to MoO2 by X-ray Photoelectron Spectroscopy

被引：50

作者：

Garland, Ben M. ^{[1
]}

Fairley, Neal ^{[2
]}

Strandwitz, Nicholas C. ^{[1
]}

Thorpe, Ryan ^{[3
]}

Bargiela, Pascal ^{[4
]}

Baltrusaitis, Jonas ^{[5
]}

机构：

[1] Lehigh Univ, Mat Sci & Engn, 5 E Packer Ave, Bethlehem, PA 18015 USA

[2] Casa Software Ltd, Bay House,5 Grosvenor Terrace,Teignmouth, Devon TQ14 8NE, England

[3] Lehigh Univ, Inst Funct Mat & Devices, 7 Asa Dr, Bethlehem, PA 18015 USA

[4] Inst Res Catalysis & Environm Lyon IRCELYON, 2 Ave Albert Einstein, F-69626 Villeurbanne, France

[5] Lehigh Univ, Dept Chem & Biomol Engn, 111 Res Dr, Bethlehem, PA 18015 USA

来源：

APPLIED SURFACE SCIENCE | 2022年 / 598卷

关键词：

XPS; MoO2; MoO3; Peak model; In situ; OXIDE THIN-FILMS; XPS; SURFACE; RAMAN;

D O I：

10.1016/j.apsusc.2022.153827

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：

Results from X-ray Photoelectron Spectroscopy (XPS) of molybdenum oxide samples are presented to elucidate how Mo (VI) oxide evolves to Mo (IV) oxide upon heating of a MoO3 sample. XPS data analysis techniques based on manipulation of spectra treated as vectors are shown and allow insights into intermediate phases of Mo oxide which suggest how the original oxide changes under the influence of heat but also supports an interpretation of as-received tetravalent Mo powders as multivalent materials. In particular, several new spectral components were observed and assigned to the Magne ' li phase as well as MoO3 domains that have been modified by the presence of X-rays or temperature. These assignments comprise a new method of data processing where sample modification is used to inform XPS data interpretation and differ from previous work where the linear relationship of the binding energy of molybdenum oxides has been used.

引用

页数：10

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