| Title: | Winning combination of Cu and Fe oxide clusters with an alumina support for low-temperature catalytic oxidation of volatile organic compounds |
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| Authors: | ID Žumbar, Tadej (Author)
ID Arčon, Iztok (Author)
ID Djinović, Petar (Author)
ID Aquilanti, Giuliana (Author)
ID Žerjav, Gregor (Author)
ID Pintar, Albin (Author)
ID Ristić, Alenka (Author)
ID Dražić, Goran (Author)
ID Volavšek, Janez (Author)
ID Mali, Gregor (Author)
ID Popova, Margarita (Author)
ID Zabukovec Logar, Nataša (Author)
ID Novak Tušar, Nataša (Author) |
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| Files: |  acsami.3c02705.pdf (11,05 MB)
MD5: 9F6FD8403245A89B52B58BADECE39601
am3c02705_si_001.pdf (1,78 MB)
MD5: C155B8532A9535251F1F1185521A5925
 https://pubs.acs.org/doi/10.1021/acsami.3c02705?goto=supporting-info
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| Language: | English |
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| Work type: | Unknown |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: | UNG - University of Nova Gorica
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| Abstract: | A γ-alumina support functionalized with transition metals is one of the most widely used industrial catalysts for the total oxidation of volatile organic compounds (VOCs) as air pollutants at higher temperatures (280−450 °C). By rational design of a
bimetal CuFe-γ-alumina catalyst, synthesized from a dawsonite alumina precursor, the activity in total oxidation of toluene as a model VOC at a lower temperature (200−380
°C) is achieved. A fundamental understanding of the catalyst and the reaction mechanism is elucidated by advanced microscopic and spectroscopic characterizations as well as by temperature-programmed surface techniques. The nature of the metal−support bonding and the optimal abundance between Cu−O−Al and Fe−O−Al species in the catalysts leads to synergistic catalytic activity promoted by small amounts of iron (Fe/Al = 0.005).
The change in the metal oxide−cluster alumina interface is related to the nature of the
surfaces to which the Cu atoms attach. In the most active catalyst, the CuO6 octahedra are
attached to 4 Al atoms, while in the less active catalyst, they are attached to only 3 Al atoms. The oxidation of toluene occurs via the Langmuir−Hinshelwood mechanism. The presented material introduces a prospective family of low-cost and scalable oxidation catalysts with superior efficiency at lower temperatures. |
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| Keywords: | Iron oxide clusters, copper oxide clusters, alumina support, synergistic effect, low-temperature total catalytic oxidation, toluene, Cu, Fe XANES, EXAFS |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Publication date: | 01.01.2023 |
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| Year of publishing: | 2023 |
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| Number of pages: | str. 28747-28762 |
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| Numbering: | Vol. 15, issue 23 |
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| PID: | 20.500.12556/RUNG-8291-1279fbf1-3f7b-2ced-f8c8-5733261da4a9  |
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| COBISS.SI-ID: | 156450051 |
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| UDC: | 544.3/.4 |
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| ISSN on article: | 1944-8244 |
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| DOI: | 10.1021/acsami.3c02705 |
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| NUK URN: | URN:SI:UNG:REP:E4MVTFOC |
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| Publication date in RUNG: | 06.07.2023 |
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| Views: | 2599 |
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| Downloads: | 27 |
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