A simultaneous operando FTIR & Raman study of propane ODH mechanism over V-Zr-O catalysts
| Autor: | Marco Daturi, Philippe Bazin, Juan José Ternero-Hidalgo, Guillaume Clet, M.O. Guerrero-Pérez, Raquel Portela, José Rodríguez-Mirasol, Tomás Cordero, Miguel A. Bañares |
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| Přispěvatelé: | Laboratoire catalyse et spectrochimie (LCS), Centre National de la Recherche Scientifique (CNRS)-École Nationale Supérieure d'Ingénieurs de Caen (ENSICAEN), Normandie Université (NU)-Normandie Université (NU)-Institut de Chimie du CNRS (INC)-Université de Caen Normandie (UNICAEN), Normandie Université (NU) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Reaction mechanism
chemistry.chemical_element Vanadium Structure-activity relationships 02 engineering and technology Reaction intermediate 010402 general chemistry 01 natural sciences Oxygen Catalysis symbols.namesake chemistry.chemical_compound Propane [CHIM.ANAL]Chemical Sciences/Analytical chemistry Dehydrogenation operando IR-Raman Propane ODH Active sites General Chemistry [CHIM.CATA]Chemical Sciences/Catalysis 021001 nanoscience & nanotechnology 0104 chemical sciences chemistry symbols Physical chemistry 0210 nano-technology Raman spectroscopy |
| Zdroj: | Catalysis Today Catalysis Today, Elsevier, In press, ⟨10.1016/j.cattod.2021.06.012⟩ |
| ISSN: | 0920-5861 |
| DOI: | 10.1016/j.cattod.2021.06.012⟩ |
| Popis: | International audience; Simultaneous operando Raman and transmission FTIR spectroscopic measurements have been combined for the study of the structure-activity relationships of V-Zr-O catalysts during propane oxidative dehydrogenation (ODH). The combination of both spectroscopies during reaction allows the identification of reaction intermediates and yields structural information about the catalyst. The experimental results are compared with available data in the literature to propose a reaction mechanism for propane ODH on V-Zr-O catalytic systems, and to identify the role of different oxygen species bound to vanadium sites. The results are consistent with a Mars-van Krevelen mechanism. Besides, they clearly show higher activity of bridging oxygen sites (V-O-V, V-OZr) than terminal V– –O bonds. |
| Databáze: | OpenAIRE |
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