X-Ray Absorption and Photoemission Studies of the Active Oxygen for Ethylene Epoxidation over Silver Full article
Journal |
Catalysis Letters
ISSN: 1011-372X , E-ISSN: 1572-879X |
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Output data | Year: 2001, Volume: 74, Number: 3-4, Pages: 121-125 Pages count : 5 DOI: 10.1023/A:1016666021405 | ||||
Tags | Epoxidation, Ethylene, Oxygen, Silver, XANES, XPS | ||||
Authors |
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Affiliations |
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Funding (2)
1 | Russian Foundation for Basic Research | 00-15-99335 |
2 | Max Planck Society |
Abstract:
Activation of clean polycrystalline silver by a C2H4 + O2 reaction mixture has been studied by XANES, XPS, and UPS. In situ monitoring of the O K-edge XAS spectrum of the pre-treated silver surface revealed a broad signal at 10–20 eV above the threshold. The comparison of the X-ray absorption spectra with O 1s and valence band photoemission data allowed us to attribute this XAS signal to “electrophilic” oxygen (Eb(O 1s) = 530.4 eV) which is known to be active in ethylene epoxidation. The complete absence of XAS features in the photon energy range typical for π* and σ* transitions of molecular oxygen (530–535 eV) indicates both the atomic origin of the electrophilic oxygen and the absence of molecular species on the catalyst surface under the present reaction conditions.
Cite:
Bukhtiyarov V.I.
, Hävecker M.
, Kaichev V.V.
, Knop-Gericke A.
, Mayer R.W.
, Schlögl R.
X-Ray Absorption and Photoemission Studies of the Active Oxygen for Ethylene Epoxidation over Silver
Catalysis Letters. 2001. V.74. N3-4. P.121-125. DOI: 10.1023/A:1016666021405 WOS Scopus РИНЦ
X-Ray Absorption and Photoemission Studies of the Active Oxygen for Ethylene Epoxidation over Silver
Catalysis Letters. 2001. V.74. N3-4. P.121-125. DOI: 10.1023/A:1016666021405 WOS Scopus РИНЦ
Files:
Full text from publisher
Dates:
Submitted: | Dec 11, 2000 |
Accepted: | May 1, 2001 |
Published print: | Jul 1, 2001 |
Identifiers:
Web of science | WOS:000170704900003 |
Scopus | 2-s2.0-0035412662 |
Elibrary | 13384659 |
Chemical Abstracts | 2001:658914 |
Chemical Abstracts (print) | 135:373231 |
OpenAlex | W1538489011 |