Impact of Mn addition on catalytic performance of Cu/SiBEA materials in total oxidation of aromatic volatile organic compounds
| Autor: | Stanislaw Dzwigaj, Piotr Kuśtrowski, Anna Rokicińska, Adam Slabon, Sebastian Jarczewski, Laetitia Valentin, Jianhong Chen, Marek Drozdek, Patrycja Majerska |
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| Přispěvatelé: | Uniwersytet Jagielloński w Krakowie = Jagiellonian University (UJ), Laboratoire de Réactivité de Surface (LRS), Institut de Chimie du CNRS (INC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Stockholm University |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Inorganic chemistry
Oxide General Physics and Astronomy chemistry.chemical_element Catalytic combustion 02 engineering and technology 010402 general chemistry 7. Clean energy 01 natural sciences Redox Catalysis Metal chemistry.chemical_compound Adsorption volatile organic compounds copper-containing catalysts Zeolite manganese-containing catalysts catalytic combustion Surfaces and Interfaces General Chemistry [CHIM.CATA]Chemical Sciences/Catalysis 021001 nanoscience & nanotechnology Condensed Matter Physics Copper 0104 chemical sciences Surfaces Coatings and Films chemistry 13. Climate action visual_art visual_art.visual_art_medium BEA zeolite 0210 nano-technology [CHIM.OTHE]Chemical Sciences/Other |
| Zdroj: | Applied Surface Science Applied Surface Science, Elsevier, 2021, 546, pp.149148. ⟨10.1016/j.apsusc.2021.149148⟩ |
| ISSN: | 0169-4332 |
| DOI: | 10.1016/j.apsusc.2021.149148⟩ |
| Popis: | International audience; Dealuminated BEA zeolite (SiBEA) was chosen as a support of metal oxide(s) phase for catalytic combustion of volatile organic compounds (VOCs). Copper and/or manganese oxide(s) were deposited at various Cu/Mn molar ratios. Factors influencing the catalytic activity were found by chosen physicochemical methods, including XRD, XRF, low-temperature N2 adsorption, FT-IR, UV–Vis-DRS, STEM-EDX, XPS and H2-TPR. Depending on the chemical composition, CuO, (CuxMn3-x)1-δO4, Cu-doped Mn3O4 or Mn2O3 was formed as the dominant phase. The active phase particles were located mainly in the interparticle voids of the zeolite support. SiBEA gained Lewis acid sites after the introduction of the metal oxide phase, especially in the case of CuO deposition. The presence of copper in the catalytic system resulted in enhanced reducibility of the active phase, and in a consequence in high catalytic activity in the total oxidation of aromatic VOCs, which proceeds according to the Mars-van Krevelen mechanism. After the introduction of Mn, the co-existence of different valence forms was found due to the redox equilibrium: Cu2+ + Mn3+ = Cu+ + Mn4+. Definitely, the addition of Mn to Cu/SiBEA increased the number of available surface vacancies and had a beneficial effect on the catalytic performance. |
| Databáze: | OpenAIRE |
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