DIFFUSE-REFLECTANCE IR-SPECTROSCOPIC STUDY OF THE PT SO4/ZRO2 SYSTEM/

Authors
IVANOV AV KUSTOV LM VASINA TV KAZANSKII VB ZEUTHEN P
Citation
Av. Ivanov et al., DIFFUSE-REFLECTANCE IR-SPECTROSCOPIC STUDY OF THE PT SO4/ZRO2 SYSTEM/, Kinetics and catalysis, 38(3), 1997, pp. 403-410
Citations number
39
Categorie Soggetti
Chemistry Physical
Journal title
Kinetics and catalysis → ACNP
ISSN journal
00231584
Volume
38
Issue
3
Year of publication
1997
Pages
403 - 410
Database
ISI
SICI code
0023-1584(1997)38:3<403:DISOTP>2.0.ZU;2-W
Abstract
Pt/SO4/ZrO2 and Pt/ZrO2 systems were studied by diffuse-reflectance IR spectroscopy. Sulfate additives were shown to change the electronic s tate of Pt supported on ZrO2. This interaction results presumably in t he formation of Ptdelta+ species that arise due to the influence of de localized protons at the surface of SO4/ZrO2. An increase in the surfa ce concentration of the metal leads to a weakening of the interaction with protons, and coexistence of Ptdelta+ and Pt-0 species becomes pos sible. Platinum in the systems modified with SO42- anions exhibits enh anced resistance to reduction.