CHARACTERIZATION OF SILICA-SUPPORTED VANADIA-PROMOTED RHODIUM CATALYSTS BY V-15-NMR SPECTROSCOPY

被引：24

作者：

LAPINA, OB ^{[1
]}

MASTIKHIN, VM ^{[1
]}

NOSOV, AV ^{[1
]}

BEUTEL, T ^{[1
]}

KNOZINGER, H ^{[1
]}

机构：

[1] UNIV MUNICH,INST PHYS CHEM,W-8000 MUNICH 2,GERMANY

来源：

CATALYSIS LETTERS | 1992年 / 13卷 / 03期

关键词：

RHODIUM; VANADIA; PROMOTER EFFECT; V-51-SOLID STATE NMR;

D O I：

10.1007/BF00770992

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：

Vanadium oxide promoted Rh/SiO2 catalyst precursors which were calcined at 573, 773, 973 and 1173 K, were characterized by V-51-NMR. V2O5 is present in all materials and RhVO4 is formed at 1173 K. An additional interaction species with vanadium in distorted tetrahedral oxygen environment is found after calcination at 973 K. These phases might have relevance for catalytic promotion of reduced Rh-degrees metal catalysts by VO(x). In addition, distorted tetrahedral VO4 species which are capable of interacting with water molecules (V2 species) and distorted octahedral species having water molecules in their coordination sphere (V5 species) have been detected.

引用

页码：203 / 211

页数：9

共 28 条

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BEUTEL T, UNPUB

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