The Nature of Electrophilic and Nucleophilic Oxygen Adsorbed on Silver Full article
| Conference |
VI Russian Conference on Catalytic Reaction Mechanisms 01-05 Oct 2002 , Москва |
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| Journal |
Kinetics and Catalysis
ISSN: 0023-1584 , E-ISSN: 1608-3210 |
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| Output data | Year: 2003, Volume: 44, Number: 3, Pages: 432-440 Pages count : 9 DOI: 10.1023/A:1024459305551 | ||||
| Tags | Epoxidation; Auger; Charge State; Metal Atom; Oxygen Anion | ||||
| Authors |
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| Affiliations |
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Funding (1)
| 1 | Russian Foundation for Basic Research | 00-15-99335 |
Abstract:
Results of a spectroscopic study of two forms of adsorbed atomic oxygen on a silver surface, which participate in ethylene epoxidation reaction, are presented. The possibility of the combined use of the methods of photoelectron spectroscopy and X-ray absorption for a detailed analysis of adsorbate electron structure on solid surfaces is demonstrated. It is found that a significant difference in the position of O 1s lines for nucleophilic (528.3 eV) and electrophilic (530.4 eV) oxygen is determined by the effects of the initial state, that is, by the difference in the charge state of oxygen anions. The use of the well-know correlation of the Auger line splitting with a Pauling charge at an oxygen atom showed a substantial difference (∼1 electron charge unit) in charge transfer from metal to the nucleophilic or electrophilic adsorbed oxygen atom. Based on the X-ray absorption data of the oxygen K-edge, it is found that there is a substantial overlap of the 4d- and 5sp orbitals of silver with oxygen 2p orbitals in the nucleophilic state in the formation of an Ag–O bond and there is only an overlap of 5sp orbitals of silver with oxygen 2p orbitals in the electrophilic state. Structural models of the adsorption site are presented for both states. The conclusion is drawn that the charge state of oxygen in oxide systems may depend substantially on its binding to metal atoms.
Cite:
Kaichev V.V.
, Bukhtiyarov V.I.
, Hävecker M.
, Knop-Gericke A.
, Mayer R.W.
, Schlögl R.
The Nature of Electrophilic and Nucleophilic Oxygen Adsorbed on Silver
Kinetics and Catalysis. 2003. V.44. N3. P.432-440. DOI: 10.1023/A:1024459305551 WOS Scopus РИНЦ ANCAN OpenAlex
The Nature of Electrophilic and Nucleophilic Oxygen Adsorbed on Silver
Kinetics and Catalysis. 2003. V.44. N3. P.432-440. DOI: 10.1023/A:1024459305551 WOS Scopus РИНЦ ANCAN OpenAlex
Original:
Каичев В.В.
, Бухтияров В.И.
, Хавекер М.
, Кноп-Герике А.
, Майер Р.В.
, Шлегл Р.
Природа электрофильной и нуклеофильной форм адсорбированного на серебре кислорода
Кинетика и катализ. 2003. Т.44. №3. С.471-480. РИНЦ
Природа электрофильной и нуклеофильной форм адсорбированного на серебре кислорода
Кинетика и катализ. 2003. Т.44. №3. С.471-480. РИНЦ
Dates:
| Submitted: | Dec 17, 2002 |
| Published print: | May 1, 2003 |
Identifiers:
| Web of science: | WOS:000183956000013 |
| Scopus: | 2-s2.0-0038107687 |
| Elibrary: | 13438443 |
| Chemical Abstracts: | 2003:480949 |
| Chemical Abstracts (print): | 139:312871 |
| OpenAlex: | W60169634 |