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3007032 
Journal Article 
Highly Oxidized Platinum Nanoparticles Prepared through Radio-Frequency Sputtering: Thermal Stability and Reaction Probability towards CO 
Svintsitskiy, DA; Kibis, LS; Stadnichenko, AI; Koscheev, SV; Zaikovskii, VI; Boronin, AI 
2015 
1 
ChemPhysChem
ISSN: 1439-4235
EISSN: 1439-7641 
16 
15 
3318-3324 
English 
26489061 
WOS:000363422600024 
Platinum-oxide nanoparticles were prepared through the radio-frequency (RF) discharge sputtering of a Pt electrode in an oxygen atmosphere. The structure, particles size, electronic properties, and surface composition of the RF-sputtered particles were studied by using transmission electron microscopy and X-ray photoelectron spectroscopy. The application of the RF discharge method resulted in the formation of highly oxidized Pt(4+) species that were stable under ultrahigh vacuum conditions up to 100 °C, indicating the capability of Pt(4+) -O species to play an important role in the oxidation catalysis under real conditions. The thermal stability and reaction probability of Pt(4+) oxide species were analyzed and compared with those of Pt(2+) species. The reaction probability of PtO2 nanoparticles at 90 °C was found to be about ten times higher than that of PtO-like structures. 
CO oxidation; nanoparticles; platinum oxide; radio-frequency sputtering; X-ray photoelectron spectroscopy