ELECTRON-OPTICAL STUDIES OF FRESH AND REDUCED VANADIUM PENTOXIDE-SUPPORTED RHODIUM CATALYSTS

被引：38

作者：

LEGROURI, A ^{[1
]}

BAIRD, T ^{[1
]}

FRYER, JR ^{[1
]}

机构：

[1] UNIV GLASGOW, CTR ELECTRON MICROSCOPE, CHEM BLDG, GLASGOW G12 8QQ, SCOTLAND

来源：

JOURNAL OF CATALYSIS | 1993年 / 140卷 / 01期

关键词：

D O I：

10.1006/jcat.1993.1076

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：

One percent Rh/V2O5 catalysts prepared by wet impregnation with RhCl3 · xH2O and subsequent reduction in hydrogen were shown to be subject to the formation of lower oxides of vanadium via an Rh-catalysed reduction process. V4O9, VO2, and V2O3 compounds were observed at reduction temperatures of 250, 450, and 600°C, respectively, as characterised by IR, XRD, and electron optical methods. Maximum hydrogen uptake by the Rh-loaded V2O5 occurred at 155°C according to TPR data, and this contrasts with the onset of reduction of V2O5 alone at ∼450°C. Mechanistic and structural aspects of the Rh-catalysed reduction process are discussed. © 1993 Academic Press, Inc.

引用

页码：173 / 183

页数：11