Role of brønsted surface acid sites of B2O3−Al2O3 catalyst supports in perylene radical cation formation studied by probe EPR with TEMPO radicals Full article
| Journal |
Journal of Physical Chemistry C
ISSN: 1932-7447 , E-ISSN: 1932-7455 |
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| Output data | Year: 2022, Volume: 126, Number: 4, Pages: 1809-1816 Pages count : 8 DOI: 10.1021/acs.jpcc.1c09670 | ||
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| Affiliations |
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Funding (1)
| 1 | Ministry of Science and Higher Education of the Russian Federation | 0239-2021-0006 |
Abstract:
For the series of borate-modified alumina samples with a wide range of B2O3 content (0−30 wt %), the regularities of the change in acid properties were studied by probe EPR spectroscopy of 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) and solid-state 1H NMR. An increase in the concentration of Brønsted acid sites (BAS) in the series with an increase in the boron oxide content to 30 wt % was found. The obtained dependences of the BAS concentration for the samples determined from TEMPO adsorption and 1H MAS NMR data are in good agreement. Also, the results of determining the BAS concentration by a direct method (via the concentration of TEMPO complexes with BAS) are close in values to the concentration of perylene radical cations determined on the surface of the corresponding B2O3−Al2O3 samples. The obtained results show that the proposed EPR approaches are promising for the quantitative analysis of surface BAS in the study of various porous acid solids.
Cite:
Yurpalov V.L.
, Drozdov V.A.
, Karpova T.R.
, Lavrenov A.V.
, Nepomnyashchii A.A.
, Buluchevskiy E.A.
Role of brønsted surface acid sites of B2O3−Al2O3 catalyst supports in perylene radical cation formation studied by probe EPR with TEMPO radicals
Journal of Physical Chemistry C. 2022. V.126. N4. P.1809-1816. DOI: 10.1021/acs.jpcc.1c09670 WOS Scopus РИНЦ OpenAlex
Role of brønsted surface acid sites of B2O3−Al2O3 catalyst supports in perylene radical cation formation studied by probe EPR with TEMPO radicals
Journal of Physical Chemistry C. 2022. V.126. N4. P.1809-1816. DOI: 10.1021/acs.jpcc.1c09670 WOS Scopus РИНЦ OpenAlex
Dates:
| Submitted: | Nov 9, 2021 |
| Accepted: | Jan 11, 2022 |
| Published online: | Jan 19, 2022 |
| Published print: | Feb 3, 2022 |
Identifiers:
| Web of science: | WOS:000745835700001 |
| Scopus: | 2-s2.0-85123943364 |
| Elibrary: | 48147627 |
| OpenAlex: | W4205337386 |