Oxidation of a Platinum Foil with Nitrogen Dioxide
Kinetics and Catalysis
, E-ISSN: 1608-3210
||NO2, oxidation, platinum, Pt3O4, PtO, XPS
Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090 Russia
Russian Science Foundation
The oxidation of a polycrystalline platinum foil by nitrogen dioxide at an NO2 pressures of 10–6–
10–4 mbar and a temperature of 525 K has been investigated by X-ray photoelectron spectroscopy (XPS).
Under these conditions, the platinum oxides PtO and Pt3O4 form on the foil surface. A comparison between
the data obtained in this study and the data on the oxidation of platinum nanoparticles suggests a hypothesis
as to the causes of the size effect in the oxidation of NO over platinum catalysts.