In situ electron paramagnetic resonance (EPR) study of surface oxygen species on Au/ZnO catalyst for low-temperature carbon monoxide oxidation

Authors
Hao, ZP Fen, LB Lu, GQ Liu, JJ An, LD Wang, HL
Citation
Zp. Hao et al., In situ electron paramagnetic resonance (EPR) study of surface oxygen species on Au/ZnO catalyst for low-temperature carbon monoxide oxidation, APP CATAL A, 213(2), 2001, pp. 173-177
Citations number
20
Categorie Soggetti
Physical Chemistry/Chemical Physics","Chemical Engineering
Journal title
APPLIED CATALYSIS A-GENERAL
ISSN journal
0926860X → ACNP
Volume
213
Issue
2
Year of publication
2001
Pages
173 - 177
Database
ISI
SICI code
0926-860X(20010530)213:2<173:ISEPR(>2.0.ZU;2-K
Abstract
Some paramagnetic superoxide ions detectable by electron paramagnetic reson ance (EPR) can be generated on Au/ZnO catalyst by oxygen adsorption at room temperature as well as at 553 K. In both the cases, the O-2(-) ions are pr esent on the catalyst surface. The disappearance of the O-2(-) signal by th e introduction of carbon monoxide over the catalyst surface implies that th e O-2(-) ions are either the active oxygen species or the precursors of the active oxygen species. The CO3- species produced are also detected by EPR. (C) 2001 Elsevier Science B.V. All rights reserved.