FTIR, XPS AND TPD STUDIES ON THE THERMAL DECOMPOSITION OF Os-3(CO)(12)/SILICA: A MULTITECHNIQUE APPROACH TO THE RESOLUTION OF SOME CONTROVERSIAL PROBLEMS

被引：24

作者：

Dossi, C. ^{[1
]}

Fusi, A. ^{[1
]}

Grilli, E. ^{[1
]}

Psaro, R. ^{[1
]}

Ugo, R. ^{[1
]}

Zanoni, R. ^{[2
]}

机构：

[1] CNR, Dipartimento Chim Inorgan & Metallorgan & Ctr, I-20133 Milan, Italy

[2] Univ Rome La Sapienza, Dipartimento Chim, I-00100 Rome, Italy

来源：

CATALYSIS TODAY | 1988年 / 2卷 / 05期

关键词：

D O I：

10.1016/0920-5861(88)85022-3

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The preparation of silica-supported osmium catalysts obtained by thermal decomposition of physisorbed Os-3(CO)(12) has been studied in situ by FTIR, XPS and TPD. Under our experimental conditions, the formation of oxidised Os(II) surface species has been confirmed, either in Ar or in O-2 atmosphere. The occurrence of high nuclearity clusters under thermal treatment has been ruled out also by the study of the surface reactivity of adsorbed [Os-10(CO)(24)C](2-). The original Os-3 framework is restored from the Os(II) surface species by prolonged treatments at 523 K under CO.

引用

页码：585 / 594

页数：10

共 20 条

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