STUDIES OF ACTIVE OXYGEN SPECIES ON THE S URFACE OF RARE-EARTH-OXIDE CATALYSTS FOR OXIDATIVE COUPLING OF METHANE

Authors
XIE WG LU SJ QIU FL
Citation
Wg. Xie et al., STUDIES OF ACTIVE OXYGEN SPECIES ON THE S URFACE OF RARE-EARTH-OXIDE CATALYSTS FOR OXIDATIVE COUPLING OF METHANE, Gaodeng xuexiao huaxue xuebao, 18(8), 1997, pp. 1372-1374
Citations number
12
Categorie Soggetti
Chemistry
Journal title
Gaodeng xuexiao huaxue xuebao → ACNP
ISSN journal
02510790
Volume
18
Issue
8
Year of publication
1997
Pages
1372 - 1374
Database
ISI
SICI code
0251-0790(1997)18:8<1372:SOAOSO>2.0.ZU;2-G
Abstract
The active oxygen species on the surface of additive/rare earth oxides (RE2O3) catalysts have been investigated by means of XPS, O-2-TPD and XRD, The results indicate that there exist O-2(-) and O2- species on the surface of the catalysts at low temperature, The performance of th e catalyst is dependent on the concentration of O-2(-) species on the catalyst surface. It is suggested that the O- species formed from O-2( -) species at high temperature is active oxygen species for OCM reacti on.