XPS studies of MoO3/Al2O3 and MoO3/SiO2 systems

被引：55

作者：

Plyuto, YV

Babich, IV

Plyuto, IV

VanLangeveld, AD

Moulijn, JA

机构：

[1] NATL ACAD SCI UKRAINE,INST SURFACE CHEM,LAB INORGAN SURFACE CHEM,UA-252022 KIEV,UKRAINE

[2] NATL ACAD SCI UKRAINE,INST MET PHYS,DEPT SURFACE SPECT,UA-252680 KIEV,UKRAINE

[3] DELFT UNIV TECHNOL,DEPT CHEM ENGN,NL-2628 BL DELFT,NETHERLANDS

来源：

APPLIED SURFACE SCIENCE | 1997年 / 119卷 / 1-2期

关键词：

alumina; silica; molybdenum(VI) oxo-species; XPS; curve fitting;

D O I：

10.1016/S0169-4332(97)00185-2

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：

The detailed analysis of the experimental XPS envelopes of the model MoO3/Al2O3 and MoO3/SiO2 systems was performed using a curve fitting procedure. It appeared possible to fit the XPS spectrum of MoO3/Al2O3 system with a single Mo 3d(5/2)-Mo 3d(3/2) doublet which indicates the presence of only one type of molybdenum(VI) ore-species. In contrast, curve fitting for MoO3/SiO2 system required two individual Mo 3d(5/2)-Mo 3d(3/2) doublets. The first Mo 3d(5/2)-Mo 3d(3/2) doublet with the binding energy close to that of bulk MoO3 was attributed to three-dimensional molybdenum(VI) oxo-species. The second Mo 3d(5/2)-Mo 3d(3/2) doublet shifted to higher binding energy, reflects the presence of monomeric or two-dimensional molybdenum(VI) ore-species which strongly interact with silica surface. (C) 1997 Elsevier Science B.V.

引用

页码：11 / 18

页数：8

共 29 条

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