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An XPS Study of the Promotion of Ru–Cs/Sibunit Catalysts for Ammonia Synthesis Full article

Общее Language: Английский, Genre: Full article,
Status: Published, Source type: Translated
Journal Kinetics and Catalysis
ISSN: 0023-1584 , E-ISSN: 1608-3210
Output data Year: 2005, Volume: 46, Number: 4, Pages: 597-602 Pages count : 6 DOI: 10.1007/s10975-005-0113-9
Authors Larichev Y.V. 1 , Prosvirin I.P. 1 , Shlyapin D.A. 2 , Shitova N.B. 2 , Tsyrulʹnikov P.G. 2 , Bukhtiyarov V.I. 1
Affiliations
1 Boreskov Institute of Catalysis SB RAS
2 Institute of Hydrocarbons Processing SB RAS

Funding (2)

1 Russian Foundation for Basic Research 02-03-32681
2 Zamaraev International Charitable Scientific Foundation

Abstract: The nature of surface cesium compounds in cesium-modified ruthenium-Sibunit catalysts for ammonia synthesis was studied by X-ray photoelectron spectroscopy (XPS). It was found that, on the reduction of promoted catalysts, cesium was incorporated into the micropores of Sibunit to form quasi-intercalation cesium-carbon bonds. In this case, the chemical state of cesium was close to its state in cesium suboxides. The subsequent interaction with atmospheric oxygen resulted in the oxidation of cesium, which occurred as cesium peroxide and cesium superoxide in the oxidized samples. Ruthenium occurred in a metallic state in the reduced samples. The activity of a Ru-Cs+/C(1) sample was higher than that of inactive Ru-Cs+/C(2). This is a consequence of the higher surface concentration of ruthenium, which is most likely due to an increase in the dispersity of metal particles, as well as of the higher probability of the interaction between the promoter and the active component due to a symbatic increase in the surface concentrations of both ruthenium and cesium.
Cite: Larichev Y.V. , Prosvirin I.P. , Shlyapin D.A. , Shitova N.B. , Tsyrulʹnikov P.G. , Bukhtiyarov V.I.
An XPS Study of the Promotion of Ru–Cs/Sibunit Catalysts for Ammonia Synthesis
Kinetics and Catalysis. 2005. V.46. N4. P.597-602. DOI: 10.1007/s10975-005-0113-9 publication_identifier_short.wos_identifier_type publication_identifier_short.scopus_identifier_type publication_identifier_short.rinz_identifier_type
ArticleLinkType.TRANSLATED_TO_ORIGINAL: Ларичев Ю.В. , Просвирин И.П. , Шляпин Д.А. , Шитова Н.Б. , Цырульников П.Г. , Бухтияров В.И.
Изучение методом РФЭС природы промотирования в Ru-Cs/Сибунит-катализаторах синтеза аммиака
Кинетика и катализ. 2005. Т.46. №4. С.635-641. publication_identifier_short.rsci_identifier_type publication_identifier_short.rinz_identifier_type
Dates:
Submitted: Jul 20, 2004
Published print: Jul 1, 2005
Identifiers:
publication_identifier.wos_identifier_type WOS:000231790000017
publication_identifier.scopus_identifier_type 2-s2.0-24044503117
publication_identifier.rinz_identifier_type 13497701
publication_identifier.accession_number_identifier_type 2005:951304
publication_identifier.chemical_accession_number_identifier_type 143:293161
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