ESR STUDY OF INFLUENCE OF OXYGEN ON MOLYBDENUM SULFIDES

被引：10

作者：

BENSIMON, Y ^{[1
]}

BELOUGNE, P ^{[1
]}

DEROIDE, B ^{[1
]}

ZANCHETTA, JV ^{[1
]}

GIUNTINI, JC ^{[1
]}

HENN, F ^{[1
]}

机构：

[1] UNIV MONTPELLIER 2,CNRS,URA D0407,PHYSIOL MAT LAB,EQUIPE CHIM PHYS,F-34095 MONTPELLIER 05,FRANCE

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 1992年 / 149卷 / 03期

关键词：

D O I：

10.1016/0022-3093(92)90070-Z

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Electron spin resonance (ESR) measurements of amorphous molybdenum sulfides MoS2+x (0 less-than-or-equal-to x less-than-or-equal-to 1) and their derived compounds MoSyOz, which are obtained by oxygen exposure at 130-degrees-C, are performed in order to determine the nature and the number of the active sites. The ESR spectrum is always the sum of three elementary signals, the responsible species of which are analyzed by means of a simulation program. These species can be related either to unsaturated sulfur atoms or to Mo(V) atoms within two different surroundings. The strong modification of the ESR spectra, around the composition MoS2.6, can be considered as a 'pseudo-transition'. The influence of oxygen exposure confirms this assumption and leads to an increasing number of paramagnetic defects in accordance with the catalytic properties of these solids.

引用

页码：218 / 228

页数：11

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