Use of the Differential Charging Effect in XPS to Determine the Nature of Surface Compounds Resulting from the Interaction of a Pt/BaCO3/Al2O3 Model Catalyst with NOx Full article
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Kinetics and Catalysis
ISSN: 0023-1584 , E-ISSN: 1608-3210 |
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| Output data | Year: 2008, Volume: 49, Number: 6, Pages: 831-839 Pages count : 9 DOI: 10.1134/S0023158408060086 | ||||||
| Tags | Model Catalyst; Barium Carbonate; Barium Nitrate; Tantalum Foil; Electron Photoemission | ||||||
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Abstract:
A Pt/BaCO3/Al2O3 model NO x storage-reduction catalyst, which was prepared as a thin film (∼100 Å) on the surface of tantalum foil, was studied by X-ray photoelectron spectroscopy (XPS). It was found that the Pt/BaCO3 and Pt/Al2O3 catalyst constituents acquired different surface charges in the course of photoelectron emission; that is, differential charging occurred. An analysis of this effect allowed us to determine the nature of the products formed in the interaction of the catalyst with a mixture of NO (260 Pa) + O2 (2600 Pa) + H2O (525 Pa) at 250°C followed by reduction with a mixture of CO (2100 Pa) + H2O (525 Pa) at 450°C. It was found that barium carbonate was converted into barium nitrate as a result of reaction with NO x on the surface of BaCO3. Simultaneously, platinum supported on both BaCO3 and Al2O3 was oxidized. The reduction of the catalyst treated with a mixture containing NO resulted in nitrate decomposition and regeneration of a carbonate coating on the surface of BaCO3; this is accompanied by the reduction of oxidized platinum particles to platinum metal.
Cite:
Smirnov M.Y.
, Kalinkin A.V.
, Dubkov A.A.
, Vovk E.I.
, Sorokin A.M.
, Nizovskii A.I.
, Carberry B.P.
, Bukhtiyarov V.I.
Use of the Differential Charging Effect in XPS to Determine the Nature of Surface Compounds Resulting from the Interaction of a Pt/BaCO3/Al2O3 Model Catalyst with NOx
Kinetics and Catalysis. 2008. V.49. N6. P.831-839. DOI: 10.1134/S0023158408060086 WOS Scopus РИНЦ ANCAN OpenAlex
Use of the Differential Charging Effect in XPS to Determine the Nature of Surface Compounds Resulting from the Interaction of a Pt/BaCO3/Al2O3 Model Catalyst with NOx
Kinetics and Catalysis. 2008. V.49. N6. P.831-839. DOI: 10.1134/S0023158408060086 WOS Scopus РИНЦ ANCAN OpenAlex
Original:
Смирнов М.Ю.
, Калинкин А.В.
, Дубков А.А.
, Вовк Е.И.
, Сорокин А.М.
, Низовский А.И.
, Carberry B.
, Бухтияров В.И.
Использование эффекта дифференциальной зарядки в методе РФЭС для установления природы поверхностных соединений, образующихся при взаимодействии модельного катализатора Pt/BaCO3/Al2O3 с NOx
Кинетика и катализ. 2008. Т.49. №6. С.876-885. РИНЦ
Использование эффекта дифференциальной зарядки в методе РФЭС для установления природы поверхностных соединений, образующихся при взаимодействии модельного катализатора Pt/BaCO3/Al2O3 с NOx
Кинетика и катализ. 2008. Т.49. №6. С.876-885. РИНЦ
Dates:
| Submitted: | Feb 27, 2008 |
| Published print: | Nov 1, 2008 |
| Published online: | Dec 3, 2008 |
Identifiers:
| Web of science: | WOS:000261342700008 |
| Scopus: | 2-s2.0-57449105885 |
| Elibrary: | 13576367 |
| Chemical Abstracts: | 2008:1443227 |
| Chemical Abstracts (print): | 151:409350 |
| OpenAlex: | W2466552868 |