PHASE COMPOSITION AND OXIDATION DEGREE OF VANADIUM IN CATALYSTS FOR OXIDATIVE DEHYDROGENATION OF PROPANE
نویسندگان
چکیده
The phase composition of vanadium and vanadium-antimony-containing samples γ-Al2O3 the degree oxidation in them were examined by XRD EPR methods, respectively. data spectroscopy show formation highly dispersed vanadium-oxygen vanadiumantimony-oxygen structures on surface support. It is shown that spectra studied are due to "isolated" ions with an state +4 nonstoichiometric vanadium-antimony-oxygen formations a square pyramid local environment structure characteristic V=O double bond. two types paramagnetic centers vanadium, which differ distortion square-pyramidal ion, identified. was established number V,Sb-containing depends V/Sb ratio them.
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ژورنال
عنوان ژورنال: Kimya probleml?ri
سال: 2022
ISSN: ['2221-8688', '2522-1655']
DOI: https://doi.org/10.32737/2221-8688-2022-3-358-365