Highly Oxidized Platinum Nanoparticles Prepared through Radio-Frequency Sputtering: Thermal Stability and Reaction Probability towards CO

Dmitry A. Svintsitskiy; Lidiya S. Kibis; Andrey I. Stadnichenko; Sergei V. Koscheev; Vladimir I. Zaikovskii; Andrei I. Boronin

doi:10.1002/cphc.201500546

Highly Oxidized Platinum Nanoparticles Prepared through Radio-Frequency Sputtering: Thermal Stability and Reaction Probability towards CO

Dmitry A. Svintsitskiy, Lidiya S. Kibis, Andrey I. Stadnichenko, Sergei V. Koscheev, Vladimir I. Zaikovskii, Andrei I. Boronin

Research output: Contribution to journal › Article › peer-review

41 Citations (Scopus)

Abstract

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 Pt⁴⁺ species that were stable under ultrahigh vacuum conditions up to 100°C, indicating the capability of Pt⁴⁺-O species to play an important role in the oxidation catalysis under real conditions. The thermal stability and reaction probability of Pt⁴⁺ oxide species were analyzed and compared with those of Pt²⁺ species. The reaction probability of PtO₂ nanoparticles at 90°C was found to be about ten times higher than that of PtO-like structures.

Original language	English
Pages (from-to)	3318-3324
Number of pages	7
Journal	ChemPhysChem
Volume	16
Issue number	15
DOIs	https://doi.org/10.1002/cphc.201500546
Publication status	Published - 1 Oct 2015

Keywords

CO oxidation
nanoparticles
platinum oxide
radio-frequency sputtering
X-ray photoelectron spectroscopy

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title = "Highly Oxidized Platinum Nanoparticles Prepared through Radio-Frequency Sputtering: Thermal Stability and Reaction Probability towards CO",

abstract = "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 Pt4+ species that were stable under ultrahigh vacuum conditions up to 100°C, indicating the capability of Pt4+-O species to play an important role in the oxidation catalysis under real conditions. The thermal stability and reaction probability of Pt4+ oxide species were analyzed and compared with those of Pt2+ species. The reaction probability of PtO2 nanoparticles at 90°C was found to be about ten times higher than that of PtO-like structures.",

keywords = "CO oxidation, nanoparticles, platinum oxide, radio-frequency sputtering, X-ray photoelectron spectroscopy",

author = "Svintsitskiy, {Dmitry A.} and Kibis, {Lidiya S.} and Stadnichenko, {Andrey I.} and Koscheev, {Sergei V.} and Zaikovskii, {Vladimir I.} and Boronin, {Andrei I.}",

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Highly Oxidized Platinum Nanoparticles Prepared through Radio-Frequency Sputtering : Thermal Stability and Reaction Probability towards CO. / Svintsitskiy, Dmitry A.; Kibis, Lidiya S.; Stadnichenko, Andrey I.; Koscheev, Sergei V.; Zaikovskii, Vladimir I.; Boronin, Andrei I.

In: ChemPhysChem, Vol. 16, No. 15, 01.10.2015, p. 3318-3324.

Research output: Contribution to journal › Article › peer-review

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AU - Kibis, Lidiya S.

AU - Stadnichenko, Andrey I.

AU - Koscheev, Sergei V.

AU - Zaikovskii, Vladimir I.

AU - Boronin, Andrei I.

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