Surface Vanadium Compounds in Supported Vanadium–Magnesium Catalysts for Ethylene Polymerization: X-ray Photoelectron and Infrared Diffusion Reflectance Spectroscopy Studies Full article
| Conference |
Physical Methods for Catalytic Research at the Molecular Level: International memorial K.I. Zamaraev conference 28 Jun - 2 Jul 1999 , Novosibirsk |
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| Journal |
Journal of Molecular Catalysis A: Chemical
ISSN: 1381-1169 |
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| Output data | Year: 2000, Volume: 158, Number: 1, Pages: 443-446 Pages count : 4 DOI: 10.1016/S1381-1169(00)00121-7 | ||||
| Tags | Ethylene polymerization, Infrared diffusion reflectance spectroscopy, NO adsorption, Oxidation state of vanadium, Vanadium-magnesium catalysts, X-ray photoelectron spectroscopy | ||||
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Abstract:
Adsorption of NO as a probe molecule in infrared diffusion reflectance spectroscopy (DRIFTS) and X-ray photoelectron spectroscopy (XPS) have been used in order to identify surface vanadium species in vanadium–magnesium catalysts (VMC). The presence of V3+ and V4+ in VCl4/MgCl2 and V4+ in VOCl3/MgCl2 was shown by XPS and DRIFTS. However, DRIFTS has some limitations due to oxidation of V3+ by the reaction with NO; moreover, apparently ions V5+ and V2+ do not adsorb NO. We have also demonstrated the possible identification of surface ions V5+ and V2+ in VMC using XPS. Practically in all cases (VCl2/MgCl2, VCl4/MgCl2 and VOCl3/MgCl2) one can see a mixture of vanadium ions in different oxidation and coordination states.
Cite:
Matsko M.A.
, Prosvirin I.P.
, Mikenas T.B.
, Zakharov V.A.
, Paukshtis E.A.
, Bukhtiyarov V.I.
, Danilova I.G.
Surface Vanadium Compounds in Supported Vanadium–Magnesium Catalysts for Ethylene Polymerization: X-ray Photoelectron and Infrared Diffusion Reflectance Spectroscopy Studies
Journal of Molecular Catalysis A: Chemical. 2000. V.158. N1. P.443-446. DOI: 10.1016/S1381-1169(00)00121-7 WOS Scopus РИНЦ ANCAN OpenAlex
Surface Vanadium Compounds in Supported Vanadium–Magnesium Catalysts for Ethylene Polymerization: X-ray Photoelectron and Infrared Diffusion Reflectance Spectroscopy Studies
Journal of Molecular Catalysis A: Chemical. 2000. V.158. N1. P.443-446. DOI: 10.1016/S1381-1169(00)00121-7 WOS Scopus РИНЦ ANCAN OpenAlex
Dates:
| Published online: | Jul 18, 2000 |
| Published print: | Sep 8, 2000 |
Identifiers:
| Web of science: | WOS:000089201200064 |
| Scopus: | 2-s2.0-0034623035 |
| Elibrary: | 13360465 |
| Chemical Abstracts: | 2000:498725 |
| Chemical Abstracts (print): | 133:335488 |
| OpenAlex: | W2069350770 |