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 ANCAN OpenAlex

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

Citing:

DB	Citing
Web of science	46
Scopus	49
Elibrary	51
OpenAlex	48

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