In situ XPS Study of Methanol Oxidation over a Copper Catalyst Derived from Layered Double Hydroxides Full article
| Journal |
Catalysis Science and Technology
ISSN: 2044-4753 , E-ISSN: 2044-4761 |
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| Output data | Year: 2024, Volume: 14, Pages: 4986-4996 Pages count : 11 DOI: 10.1039/d4cy00675e | ||
| Tags | Alumina; Aluminum oxide; Catalysis; Catalysts; Copper compounds; High resolution transmission electron microscopy; Mass spectrometry; Molar ratio; Oxidation; Photoelectrons; Photons; Synthesis (chemical); Thermoanalysis; X ray photoelectron spectroscopy | ||
| Authors |
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| Affiliations |
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Funding (1)
| 1 | Ministry of Science and Higher Education of the Russian Federation | 075-15-2022-263 |
Abstract:
Copper nanoparticles supported on alumina have been synthesized from CuAl-layered double hydroxide by heat treatment at 450 °C and have been characterized by thermal analysis, X-ray diffraction, transmission electron microscopy, and X-ray photoelectron spectroscopy. Methanol oxidation at different molar ratios of the components of the reaction feed (CH3OH : O2 = 1 : 1, 3 : 1, 6 : 1 and 1 : 3, Ptotal = 0.012 mbar) over the prepared CuAlOx catalyst has been studied by in situ X-ray photoelectron spectroscopy and mass-spectrometry. It was revealed that methanol oxidation takes place at temperatures higher than 250 °C. The conversion of methanol and selectivities towards CH2O and CO2 were found to depend on the molar ratio of the reaction mixture components and reaction temperature. A quantitative estimation of the surface composition for the CuAlOx catalyst under different experimental conditions was performed based on the deconvolution of copper Auger spectra using a linear combination of individual components. It was shown that treatment of the as-loaded CuAlOx catalyst in hydrogen at 300 °C led to a partial reduction of Cu+ to Cu0. However, there were only Cu0 species on the surface in the CH3OH : O2 = 1 : 1 reaction mixture at 400 °C indicating the formation of active sites directly during the catalytic reaction. Metallic copper was shown to be an active component for the production of formaldehyde under the conditions of methanol excess in the reaction mixture.
Cite:
Panafidin M.A.
, Bukhtiyarov A.V.
, Fedorov A.Y.
, Bukhtiyarova M.V.
, Prosvirin I.P.
, Bukhtiyarov V.I.
In situ XPS Study of Methanol Oxidation over a Copper Catalyst Derived from Layered Double Hydroxides
Catalysis Science and Technology. 2024. V.14. P.4986-4996. DOI: 10.1039/d4cy00675e WOS Scopus РИНЦ AN OpenAlex
In situ XPS Study of Methanol Oxidation over a Copper Catalyst Derived from Layered Double Hydroxides
Catalysis Science and Technology. 2024. V.14. P.4986-4996. DOI: 10.1039/d4cy00675e WOS Scopus РИНЦ AN OpenAlex
Dates:
| Submitted: | May 28, 2024 |
| Accepted: | Jul 15, 2024 |
| Published online: | Jul 15, 2024 |
| Published print: | Sep 7, 2024 |
Identifiers:
| Web of science: | WOS:001276153100001 |
| Scopus: | 2-s2.0-85199704622 |
| Elibrary: | 68992685 |
| Chemical Abstracts: | 2024:1633582 |
| OpenAlex: | W4400654251 |