Enhanced catalytic activity of air-calcined fluorination catalyst

被引：32

作者：

Chung, YS

Lee, H

Jeong, HD

Kim, YK

Lee, HG

Kim, HS

Kim, S ^{[1
]}

机构：

[1] Korea Inst Sci & Technol, Ctr Mol Sci, Taejon 305701, South Korea

[2] Korea Inst Sci & Technol, Dept Chem, Taejon 305701, South Korea

[3] Korea Inst Sci & Technol, Seoul 130650, South Korea

来源：

JOURNAL OF CATALYSIS | 1998年 / 175卷 / 02期

关键词：

D O I：

10.1006/jcat.1998.2016

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：

The catalytic activity of the air-calcined catalyst of CrF3 . 4H(2)O for the fluorination reaction of CF3CH2Cl was found to be 20 times higher than that of CrF3 . 4H(2)O. Photoacoustic spectroscopy measurements and XPS revealed the existence of various chromium phases and an increased density-of-states near the Fermi energy level in this catalyst. The increased catalytic activity of the air-calcined sample is attributed to the relatively easier formation of labile fluorine on the catalyst surface due to the stronger interaction between the valence band of CrOxFy and the antibonding orbitals of HF. (C) 1998 Academic Press.

引用

页码：220 / 225

页数：6

共 32 条

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Albright T. A., 1985, ORBITAL INTERACTION

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