Photoluminescence of Surface Chromium Centers in the Cr/Al2O3 System that is Active in Isobutane Dehydrogenation Full article
| Journal |
Materials Chemistry and Physics
ISSN: 0254-0584 , E-ISSN: 1879-3312 |
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| Output data | Year: 2019, Volume: 234, Pages: 403-410 Pages count : 8 DOI: 10.1016/j.matchemphys.2019.05.022 | ||
| Tags | Cr/Al2O3 catalysts; Isobutane dehydrogenation; Surface luminescence centers | ||
| Authors |
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| Affiliations |
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Funding (2)
| 1 | Ministry of Science and Higher Education of the Russian Federation | ГЗ-2017-2020 |
| 2 | Russian Foundation for Basic Research | 18-03-00087 |
Abstract:
A comprehensive study of optical and catalytic properties of highly dispersed single-phase η-, γ- and
γ*-Al2O3 ([Cr3+] ~ 10–4 wt.%) powders and the related model chromia-alumina catalysts with different chromium content ([Cr3+] = 0.25, 0.5 and 1 wt%) was carried out. The catalytic characteristics (product yield, conversion and selectivity) in isobutane dehydrogenation to isobutylene were measured for all the samples under consideration. The surface Cr3+S luminescence centers were detected by photoluminescence spectroscopy in all the samples. The content of Cr3+S centers in the samples was estimated before and after isobutane dehydrogenation. It was shown that the amount of surface Cr3+S centers correlates with isobutylene yields of the reaction. Among the studied samples, the maximum amount of Cr3+S luminescence centers was found for the model 1% Cr/γ-Al2O3 catalyst. This sample has the highest values of isobutane conversion and isobutylene yield. The comprehensive study of the Cr/Al2O3 systems made it possible to propose a method for predicting the catalytic activity of nanostructured materials using the photoluminescence detection of surface luminescence centers and their
quantitative evaluation.
Cite:
Baronskiy M.G.
, Kostyukov A.I.
, Larina T.V.
, Snytnikov V.N.
, Zaitseva N.A.
, Zhuzhgov A.V.
Photoluminescence of Surface Chromium Centers in the Cr/Al2O3 System that is Active in Isobutane Dehydrogenation
Materials Chemistry and Physics. 2019. V.234. P.403-410. DOI: 10.1016/j.matchemphys.2019.05.022 WOS Scopus РИНЦ AN OpenAlex
Photoluminescence of Surface Chromium Centers in the Cr/Al2O3 System that is Active in Isobutane Dehydrogenation
Materials Chemistry and Physics. 2019. V.234. P.403-410. DOI: 10.1016/j.matchemphys.2019.05.022 WOS Scopus РИНЦ AN OpenAlex
Dates:
| Submitted: | Nov 15, 2018 |
| Accepted: | May 14, 2019 |
| Published online: | May 16, 2019 |
| Published print: | Aug 1, 2019 |
Identifiers:
| Web of science: | WOS:000491299900047 |
| Scopus: | 2-s2.0-85068531567 |
| Elibrary: | 41636029 |
| Chemical Abstracts: | 2019:1369406 |
| OpenAlex: | W2945654264 |