An XPS Study of the Oxidation of Noble Metal Particles Evaporated onto the Surface of an Oxide Support in Their Reaction with NO x Full article
| Journal |
Kinetics and Catalysis
ISSN: 0023-1584 , E-ISSN: 1608-3210 |
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| Output data | Year: 2012, Volume: 53, Number: 1, Pages: 117-124 Pages count : 8 DOI: 10.1134/S0023158412010132 | ||
| Tags | Platinum Group Metal; Model Catalyst; Tantalum Foil; Noble Metal Particle; Rhodium Oxide | ||
| Authors |
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| Affiliations |
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Funding (2)
| 1 | Russian Foundation for Basic Research | 09-03-91225 |
| 2 | Russian Foundation for Basic Research | 10-03-00596 |
Abstract:
The interaction of the model catalysts Rh/Al2O3, Pd/Al2O3, Pt/Al2O3, and Pt/SiO2 with NO x (mixture of 10 Torr of NO and 10 Torr of O2) was studied by X-ray photoelectron spectroscopy (XPS). Samples of the model catalysts were prepared under vacuum conditions as oxide films ≥100 Å in thickness on tantalum foil with evaporated platinum-group metal particles. According to transmission electron microscopic data, the platinum-group metal particle size was several nanometers. It was found by XPS that the oxidation of Rh and Pd nanoparticles in their interaction with NO x occurs already at room temperature. The particles of platinum were more stable: their oxidation under the action of NO x was observed at elevated temperatures of ∼300°C. At room temperature, the interaction of platinum nanoparticles with NO x hypothetically leads to the dissolution (insertion) of oxygen atoms in the bulk of the particles with the retention of their metallic nature. It was found that dissolved oxygen is much more readily reducible by hydrogen than the lattice oxygen of the platinum oxide particles.
Cite:
Smirnov M.Y.
, Vovk E.I.
, Kalinkin A.V.
, Pashis A.V.
, Bukhtiyarov V.I.
An XPS Study of the Oxidation of Noble Metal Particles Evaporated onto the Surface of an Oxide Support in Their Reaction with NO x
Kinetics and Catalysis. 2012. V.53. N1. P.117-124. DOI: 10.1134/S0023158412010132 WOS Scopus РИНЦ ANCAN OpenAlex
An XPS Study of the Oxidation of Noble Metal Particles Evaporated onto the Surface of an Oxide Support in Their Reaction with NO x
Kinetics and Catalysis. 2012. V.53. N1. P.117-124. DOI: 10.1134/S0023158412010132 WOS Scopus РИНЦ ANCAN OpenAlex
Original:
Смирнов М.Ю.
, Вовк Е.И.
, Калинкин А.В.
, Пашис А.В.
, Бухтияров В.И.
Исследование методом РФЭС окисления частиц благородных металлов, напылённых на поверхность оксидного носителя, в реакции с NOx
Кинетика и катализ. 2012. Т.53. №1. С.120-127. РИНЦ
Исследование методом РФЭС окисления частиц благородных металлов, напылённых на поверхность оксидного носителя, в реакции с NOx
Кинетика и катализ. 2012. Т.53. №1. С.120-127. РИНЦ
Dates:
| Submitted: | Apr 8, 2011 |
| Published print: | Feb 1, 2012 |
| Published online: | Feb 14, 2012 |
Identifiers:
| Web of science: | WOS:000302314100014 |
| Scopus: | 2-s2.0-84861152420 |
| Elibrary: | 17985566 |
| Chemical Abstracts: | 2012:214995 |
| Chemical Abstracts (print): | 156:571881 |
| OpenAlex: | W2140369909 |