THE ROLE OF SO2 IN THE OXIDATION OF CO OVER SUPPORTED PLATINUM-GROUP METALS

Authors
BONDAREVA NK PANCHISHNYI VI MATYSHAK VA
Citation
Nk. Bondareva et al., THE ROLE OF SO2 IN THE OXIDATION OF CO OVER SUPPORTED PLATINUM-GROUP METALS, Kinetics and catalysis, 33(5-6), 1992, pp. 892-898
Citations number
19
Categorie Soggetti
Chemistry Physical
Journal title
Kinetics and catalysis → ACNP
ISSN journal
00231584
Volume
33
Issue
5-6
Year of publication
1992
Pages
892 - 898
Database
ISI
SICI code
0023-1584(1992)33:5-6<892:TROSIT>2.0.ZU;2-2
Abstract
In the presence of SO2 the efficiency of oxidation of CO and hydrocarb ons over supported platinum group metals is lowered. Spectral measurem ents under reaction conditions made it possible to determine two possi ble reasons for this phenomenon: an increase in the degree of oxidatio n of the supported metal atoms in the presence of SO2 and blocking of the active phase as a result of the formation of Pt-SO(x) surface comp lexes. One of the methods of decreasing the contaminating effect of SO 2 is protection of the support surface with a coating Of SiO2 which su bstantially lowers the rate of formation of sulfates and decreases the stability of the Pt-SO(x) surface complexes.