OXIDATIVE COUPLING OF METHANE OVER CAF2 S M2O3 CATALYSTS/

Authors
ZHOU SQ LONG RQ HUANG YP WAN HL TSAI KR
Citation
Sq. Zhou et al., OXIDATIVE COUPLING OF METHANE OVER CAF2 S M2O3 CATALYSTS/, Gaodeng xuexiao huaxue xuebao, 16(2), 1995, pp. 290-292
Citations number
5
Categorie Soggetti
Chemistry
Journal title
Gaodeng xuexiao huaxue xuebao → ACNP
ISSN journal
02510790
Volume
16
Issue
2
Year of publication
1995
Pages
290 - 292
Database
ISI
SICI code
0251-0790(1995)16:2<290:OCOMOC>2.0.ZU;2-B
Abstract
The results slowed that, with the addition of CaF2, to Sm2O3, the cata lytic properties for OCM were apparently improved. XRD analysis of the fresh catalysts revealed the existence of SmOF in 20%-80% CaF2/Sm2O3. XPS and IR spectra of O-2-pre adsorbed CaF2/Sm2O3 samples taken at ro om temperature indicated the presence of O-2(2-) and O-2(-) species. O -2(-) species could also be detected over 20%CaF2/Sm2O3 at 500 degrees C in situ IR spectroscopy, but it vanished over the Sm2O3 at the same temperature.