Combined Operando XANES and NMR and ESR Spectroscopies for the Determination of VPO Dynamic States Full article
| Journal |
Topics in Catalysis
ISSN: 1022-5528 , E-ISSN: 1572-9028 |
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| Output data | Year: 2023, Volume: 66, Pages: 1161–1170 Pages count : 10 DOI: 10.1007/s11244-023-01827-2 | ||||||
| Tags | Nanoscaled VPO catalysts; Operando XANES; 51V; 27Al; 31P NMR; ESR | ||||||
| Authors |
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| Affiliations |
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Funding (2)
| 1 | Ministry of Science and Higher Education of the Russian Federation | 0239-2021-0010 |
| 2 | Ministry of Economic Affairs and Digital Transformation | CTQ2014-57578-R |
Abstract:
Nanoscaled-VPO (vanadium phosphate oxide) catalysts have been prepared on an alumina support with the objective of obtaining crystallites of the active phase with a high surface-to-volume ratio. Since the catalysed reaction occurs at the surface, these nanoscaled catalysts allows studying surface species transformations with a minimized signal from the bulk dominion. The chemical environment and oxidation state of these species has been determined by a combination of NMR, ESR and XANES spectroscopies. The results have allowed to optimize V + P coverage and V/P molar ratio to minimize the concentration of isolated vanadium oxide species and maximize V4+ concentration. The distribution of phosphorus islands ordered and significantly distorted of tetra- and penta-coordinated aluminium sites of the catalytic support, thus shaping the catalytic material to an optimal structure for the desired partial oxidation reaction.
Cite:
Guerrero-Pérez M.O.
, Lapina O.B.
, Rasmussen S.B.
, Bañares M.A.
Combined Operando XANES and NMR and ESR Spectroscopies for the Determination of VPO Dynamic States
Topics in Catalysis. 2023. V.66. P.1161–1170. DOI: 10.1007/s11244-023-01827-2 WOS Scopus РИНЦ AN OpenAlex
Combined Operando XANES and NMR and ESR Spectroscopies for the Determination of VPO Dynamic States
Topics in Catalysis. 2023. V.66. P.1161–1170. DOI: 10.1007/s11244-023-01827-2 WOS Scopus РИНЦ AN OpenAlex
Dates:
| Accepted: | May 3, 2023 |
| Published online: | May 29, 2023 |
| Published print: | Sep 1, 2023 |
Identifiers:
| Web of science: | WOS:000996377800001 |
| Scopus: | 2-s2.0-85160451604 |
| Elibrary: | 54918703 |
| Chemical Abstracts: | 2023:1124844 |
| OpenAlex: | W4378717357 |