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Journal article
Catalytic Behaviour of CuOx and VOx on Ti3SiC2 Support for Direct Oxidation of Methane
Catalysis today, v 443, 114959
Jan 2025
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Abstract
Herein we show that the Ti3SiC2 MAX phase can be used as a support for deposition of different amounts of metal oxides (MOx, M = Cu or V) (5, 10 and 20wt. %) for the direct oxidation of methane to formaldehyde using molecular oxygen, at relatively lower temperatures and atmospheric pressure. The oxides were deposited using a hydrothermal method at 180 °C without affecting the bulk MAX phase structure. However, during the hydrothermal treatment (HT) a thin oxide layer - found to play an important role in the reaction's selectivity– was evidenced by X-ray photoelectron spectroscopy. Therefore, from the data obtained, we conclude that the MOx species are responsible for the CH4 activation, while the Ti3SiC2 surface is responsible for the high selectivity to formaldehyde indicating that, Ti3SiC2 has great potential for designing innovative catalysts for direct oxidation of methane using molecular oxygen and at atmospheric pressure.
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•MOx(M=V or Cu)/Ti3SiC2 (MAX phase) was successfully prepared by a hydrothermal method at 180 °C•Direct oxidation of methane (DOM) to formaldehyde was done using molecular oxygen at atmospheric pressure•The synergy between MOx and Ti3SiC2 (MAX phase) leads to excellent formaldehyde selectivity•20%CuOx/Ti3SiC2 exhibit a CH4 conversion of almost 4% and a selectivity in HCHO of 84% at 325 °C
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Details
- Title
- Catalytic Behaviour of CuOx and VOx on Ti3SiC2 Support for Direct Oxidation of Methane
- Creators
- Alexandra C. Iacoban - National Institute of Materials Physics, 405A Atomistilor street, 077125 Magurele, RomaniaToton Haldar - National Institute of Materials Physics, 405A Atomistilor street, 077125 Magurele, RomaniaFlorentina Neaţu - National Institute of Materials Physics, 405A Atomistilor street, 077125 Magurele, RomaniaIuliana M. Chirica - National Institute of Materials Physics, 405A Atomistilor street, 077125 Magurele, RomaniaAnca G. Mirea - National Institute of Materials Physics, 405A Atomistilor street, 077125 Magurele, RomaniaŞtefan Neaţu - National Institute of Materials Physics, 405A Atomistilor street, 077125 Magurele, RomaniaMichel W. Barsoum - Drexel UniversityMihaela Florea - National Institute of Materials Physics, 405A Atomistilor street, 077125 Magurele, Romania
- Publication Details
- Catalysis today, v 443, 114959
- Publisher
- Elsevier
- Number of pages
- 12
- Grant note
- Ministry of Research, Innovation and Digitization, CNCS-UEFISCDI: PN-III-P4-PCE-2021-1461, PN-III-P4-ID-ERC-2021-0007 Romanian Ministry of Research, Innovation and Digitization: PC3-PN23080303 NSF: DMR-2211319
This work was supported by grants of the Ministry of Research, Innovation and Digitization, CNCS-UEFISCDI, project number PN-III-P4-PCE-2021-1461 and PN-III-P4-ID-ERC-2021-0007, all within PNCD IIII. Financial support from Romanian Ministry of Research, Innovation and Digitization through the Core Program 2023-2026 (contract PC3-PN23080303) is gratefully acknowledged. This work was also supported by NSF (DMR-2211319).
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:001296881600001
- Scopus ID
- 2-s2.0-85201101917
- Other Identifier
- 991021897245404721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Chemistry, Applied
- Chemistry, Physical
- Engineering, Chemical