XANES investigation of co-precipitated Fe and Cr fluorides catalytically active in heterogeneous dehydrochlorination

被引：5

作者：

Bose, O

Adamczyk, B

Fiedler, K

Kemnitz, E

机构：

[1] Humboldt Univ, Inst Chem, D-10115 Berlin, Germany

[2] Bundesanstalt Mat Forsch & Prufung, D-12200 Berlin, Germany

来源：

CATALYSIS LETTERS | 1998年 / 54卷 / 04期

关键词：

XANES; iron fluoride; chromium fluoride; Lewis acid sites; dehydrochlorination;

D O I：

10.1023/A:1019081401017

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：

In this X-ray absorption near-edge structure (XANES) study we focused our interest on co-precipitated Fe and Cr fluorides. Compounds with a low Cr content are catalytically active in the dehydrochlorination of 1,1,1-trichloroethane. XANES reveals for these samples an incorporation of a modified CrF3-x(OH)(x) pyrochlore structure into the beta-FeF3 host lattice and an electron-deficient Cr 3d orbital, which may act as a Lewis acid site in the catalytic process.

引用

页码：211 / 216

页数：6

共 8 条

[1] Magnesium- and iron-doped chromium fluoride hydroxyfluoride: Synthesis, characterization and catalytic activity [J].