Pt nanoparticles embedded in CeO 2 and CeZrO 2 catalysts for biogas upgrading: Investigation on carbon removal mechanism by oxygen isotopic exchange and DRIFTS
| Autor: | André L.A. Marinho, Florence Epron, Fabio Souza Toniolo, Nicolas Bion, Fabio B. Noronha, Raimundo C. Rabelo-Neto |
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| Přispěvatelé: | Institut de Chimie des Milieux et Matériaux de Poitiers (IC2MP), Université de Poitiers-Institut national des sciences de l'Univers (INSU - CNRS)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Unité de Catalyse et Chimie du Solide - UMR 8181 (UCCS), Centrale Lille Institut (CLIL)-Université d'Artois (UA)-Centrale Lille-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC)-Université de Lille, Université d'Artois (UA)-Centrale Lille-Institut de Chimie du CNRS (INC)-Université de Lille-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Materials science
chemistry.chemical_element Nanoparticle Sintering 02 engineering and technology 010402 general chemistry 01 natural sciences 7. Clean energy Oxygen Methane Catalysis chemistry.chemical_compound Ceria Lattice Oxygen Chemical Engineering (miscellaneous) Waste Management and Disposal Carbon dioxide reforming Process Chemistry and Technology Coke [CHIM.CATA]Chemical Sciences/Catalysis Carbon Dioxide 021001 nanoscience & nanotechnology 0104 chemical sciences chemistry Chemical engineering 13. Climate action Pt nanoparticle 0210 nano-technology Carbon Ceria-Zirconia |
| Zdroj: | Journal of CO2 Utilization Journal of CO2 Utilization, Elsevier, 2021, 49, pp.101572. ⟨10.1016/j.jcou.2021.101572⟩ Journal of CO2 Utilization, 2021, 49, pp.101572. ⟨10.1016/j.jcou.2021.101572⟩ |
| ISSN: | 2212-9820 |
| DOI: | 10.1016/j.jcou.2021.101572⟩ |
| Popis: | International audience; This work investigated the effect of Pt nanoparticles embedded into CeO2 (Pt@CeO2) and CeZrO2 (Pt@CeZrO2) on the carbon removal mechanism for the dry reforming of methane, in comparison to impregnated Pt/CeO2. Morphological and structural characterization by TEM and Raman spectroscopy showed that Pt sintering is suppressed on both structures and the doping with Zr led to the CeZrO2 solid solution formation. A combination of TPR, oxygen isotopic exchange and DRIFTS measurements demonstrated that embedded Pt nanoparticles interact more strongly with ceria than supported Pt, and as a consequence, reactive lattice oxygen becomes more abundant on the catalyst surface, promoting the mechanism of carbon gasification over Pt nanoparticle. The low availability of oxygen species on Pt/CeO2 resulted in higher carbon formation, as demonstrated by TPO analysis. Therefore, the Pt@CeO2 and Pt@CeZrO2 catalysts were more resistant to coke formation due to the higher presence of reactive oxygen species at the metal-support interface, promoting the balance between the rates of carbon formation and carbon gasification over Pt nanoparticle. |
| Databáze: | OpenAIRE |
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